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Bladder Cancer
Presented by
Dr. Hari Prasad Baral
Dr. Rojan Adhikari
Shahid Dhrma Bhakta National Transplant Center
Introduction to Bladder
growth
• BENIGN TUMORS OF THE BLADDER
1. Epithelial metaplasia
2. Leukoplakia
3. Inverted papilloma
4. Nephrogenic adenoma
5. Leiomyoma
6. Cystitis cystica
7. Cystitis glandularis.
Epithelial Metaplasia
• focal areas of transformed urothelium with normal nuclear and cellular
architecture surrounded by normal urothelium usually located on the trigone.
• Approximately 40% of women and 5% of men have squamous metaplasia of
the bladder, which is usually related to infection, trauma, or surgery (Ozbey et
al, 1999).
• Treatment is unnecessary, and a preventive agent has not been identified.
Types of epithelial metaplasia
Squamous metaplasia
- often has a knobby appearance
and is covered by white, flaky,
easily disrupted material lying on
the trigone.
Glandular metaplasia
- appears as clumps of raised red
areas that appear inflammatory
and are often confused for cancer
Leukoplakia
• keratin deposition that appears as a white flaky substance floating in the
bladder (Staack et al, 2006).
• occurs in other organs that are covered by squamous epithelium.
• often premalignant (Zhang et al, 2009).
• cytogenetic studies are consistent with a benign lesion.
• no treatment.
Inverted Papilloma
• benign proliferative lesion associated with chronic inflammation or BOO
and can be located throughout the bladder but most commonly on the
trigone
• comprising less than 1% of all bladder tumors
• The use FISH to evaluate chromosomal changes can distinguish between
an inverted papilloma and a urothelial cancer (Jones et al, 2007).
• Transurethral resection is the treatment of choice
Papilloma
• composed of delicate stalks lined by normal-appearing urothelium
• rarely have mitotic figures and lack markers of aggressive growth such as P53
or RB mutations, but 75% of these tumors have mutations in FGFR-3.
• Papillomas may recur
• but they do not progress or invade.
Nephrogenic Adenoma
•
• rare tumor caused by chronic irritation of the urothelium.
• lesion may be vascular, which explains the presence of gross hematuria
(Franke et al, 2011).
• 2 school of thoughts on origin:
1.chronic inflammation causing metaplastic changes to the urothelium lead
to nephrogenic adenoma
2.arises from displaced mesonephric tissue in the urothelium that is
activated with mucosal injury.
• Treatment is transurethral resection and elimination of irritation.
Cystitis Cystica and Glandularis
• a common finding associated with inflammation or chronic obstruction.
• cystic nests that are lined by columnar or cuboidal cells and are typically associated with
proliferation.
• Cystitis glandularis can be associated with pelvic lipomatosis and may occupy the majority of
the bladder (Buckley et al, 2007).
• voiding symptoms and hematuria.
• Treatment is transurethral resection and relief of the obstruction or inflammatory condition.
Leiomyoma
• most common nonepithelial benign tumor
• Leiomyomas appear as smooth indentations of the bladder and can be
confused with a bladder tumor
• MRI can confirm the diagnosis and spare invasive procedures (Fasih et al,
2008).
• Surgical resection is required if the leiomyoma is large or painful.
UROTHELIAL CANCER
• Epidemiology
• American Cancer Society statistics:
- 72,570(54,610 men and 17,960 women) and accounting for 7% of all
cancers.
• 3% of all cancer deaths (Siegelet al, 2013)
Gender, Racial, and Age Differences
• M:F::3-4:1
• White> black
• peaks in 8th decade
Global Burden of Bladder Cancer
• highest occurring in Southern and
Eastern Europe, parts of Africa,
the Middle East, and North America,
and the lowest occurring in Asia
and underdeveloped areas in Africa.
• In North America and Europe,
- 95% to 97% of cases are urothelial
carcinoma
• Africa 60% to 90% are urothelial and 10% to 40% are squamous cell.
Etiology
 Genetic abnormalities
 External risk factors,
• carcinogen exposure,
• smoking
• nutritional factors,
• fluid intake,
• alcohol,
• inflammation,
• infection,
• chemotherapy,
• radiation,
• artificial sweeteners
Genetic Factors
• are related to susceptibility to environmental carcinogens.
• N-acetyltransferase (NAT) detoxifies nitrosamines, a known bladder
carcinogen.
• slow NAT-2 polymorphism is related to bladder cancer with an odds ratio
of 1.4 compared with the fast polymorphism (Garcia-Closas et al, 2005).
• Glutathione-S-transferase (GSTM1) conjugates several reactive chemicals,
including arylamines and nitrosamines.
• Null GSTM1 polymorphism is associated with an increased risk with a
relative risk of 1.5 (Garcia-Closas et al, 2005).
Hereditary
• First-degree relatives have a twofold increased risk (Kiemeney, 2008).
• risk is higher for women and nonsmokers.
• not associated with bladder cancer formation at an earlier age.
• no clear mendelian inheritance patterns, making classic linkage studies
impossible.
• inherited low penetetrance genes makes a person more susceptible to
carcinogenic exposure, thus of bladder cancer formation.
Smoking
• Tobacco(cigratte smoking) accounts for 60% and 30% of all urothelial
cancers in males and females, respectively ( Freedman et al, 2011)
• Relative risk is 2.8 and 2.73 in men and women, respectively
• Two to six times greater chance of developing urothelial cancer with
smoking
• Intensity and duration of smoking are related to the increased risk.
• The risk of secondhand smoke is low and not statistically different from
that for nonsmokers.
Nutritional Factors
Most nutrients or other metabolites are excreted in the urine and have
prolonged contact with the urothelium.
Preventive(detoxification.)
• fruits and vegetables(citrus
fruits, apples, berries,
tomatoes, carrots, and
cruciferous)
• Micronutrients (antioxidants)
including vitamins A, C, and E;
selenium; and zinc
causing or promoting
• salted and barbequed meat,
• pork
• total fat
• pickled vegetables
• soy
• spices
• coffee
• tea
Analgesic Abuse.
• acetaminophen or phenacetin (5 to 15 kg during a 10-year period) have
been associated with an increased risk of bladder cancer .
Infection
• squamous cell carcinoma in patients chronically
infected with Schistosoma haematobium.
• a possible link between human papillomavirus (HPV)
and urothelial cancer formation.
• HPV encodes two oncoproteins, E6 and E7. E6 interacts with TP53, which has a
role in bladder cancer progression and formation (Westenend et al, 2001).
• Potential carcinogens were produced with chronic UTI.
Radiation.
• association between radiation exposure and bladder cancer formation is
primarily based on atomic bomb survivors during World War II.
• Further support that radiation can cause bladder cancer is an increased
risk of urothelial cancer in patients with prostate or cervical cancer who
were treated with radiation therapy.
Chemotherapy
Chemotherapy destroys malignant cells by causing
• significant DNA and cellular damage on rapidly dividing urothelium.
• The only chemotherapeutic agent that has been proven to cause bladder
cancer is cyclophosphamide ( Nilsson and Ullen, 2008).
• Phosphoramide mustard is the mutagenic metabolite that causes
bladder cancer in patients exposed to cyclophosphamide.
Occupational exposure
• second most important risk factor for BC( accounting for about 10%
of all cases)
• The primary culprits are the aromatic amines that bind to DNA.
• benzidine , β-naphthylamine ,aromatic amines, polycyclic aromatic
hydrocarbons, diesel exhaust and chlorinated hydrocarbons.
• mainly in industrial plants, which process paint, rubber, dye, metal
and petroleum products.
symptoms
• Gross, painless hematuria is the primary symptom in 85% of patients with a
newly diagnosed bladder tumor, and microscopic hematuria occurs in virtually all
patients (Khadra et al, 2000;Alishahi et al, 2002; Wallard et al,2006).
• Carcinoma in situ with irritative LUTS Vs large mass obstrutive LUTS.
• suprapubic pain, recurrent UTI, pneumaturia
• Urachal adenocarcinomas - a blood or mucus umbilical discharge or a deep sub-
umbilical mass.
• Advanced bladder cancer - lower limb swelling due to lymphatic/ venous
obstruction, bone pain, weight loss, anorexia, confusion.
• anuria (renal failure due to bilateral ureteric obstruction).
Signs
• General examination may reveal pallor, indicating anaemia due to blood
loss or chronic renal impairment.
• Abdominal examination may reveal a suprapubic mass in the case of
locally advanced disease; DRE may reveal a pelvic mass above, or
involving, the prostate.
• If this mass is mobile (best assessed on bimanual examination under GA)
• bimanual examination is mandatory before and after bladder tumour
resection to assess size, position, and mobility (i.e. stage)
Ultrasound
• Primary screening modality
Permits:
• visualisation of intraluminal mass with vasularity on color doppler
• detection of hydronephrosis(uo or distal ureter involvement)
• ? lymphnode status
• but cannot rule out all potential causes of haematuria
Computed tomography
. urography
• detect papillary tumours in the urinary tract, indicated by filling defects
and/or hydronephrosis.
• provides more information (including status of lymph nodes and
neighbouring organs).
• useful for staging
magnetic resonance imaging (MRI)
• MRI has not yet been established in BC diagnosis and staging.
• A standardised methodology of MRI reporting in patients with BC was
recently published but requires validation .
• A diagnosis of CIS cannot be made with imaging methods alone (CT
urography, IVU, US or MRI).
Urinary cytology
• has high sensitivity in G3 and high-grade tumours (84%), but low sensitivity in
G1/LG tumours (16%)
• The sensitivity in CIS detection is 28-100% .
• Positive voided urinary cytology can indicate an urothelial carcinoma
anywhere in the urinary tract.
• false- positive cytology can arise due to infection, inflammation, stones,
instrumentation, and intravesical instillations such as chemotherapy.
• negative cytology, however, does not exclude its presence.
interpretation is user-dependent
urinary cytology diagnostic categories
• Urine collection should respect the recommendation.
• In patients with suspicious cytology repeat investigation is advised .
Paris Working Group :2016
• adequacy of urine specimens Adequacy
• negative for high-grade urothelial
carcinoma
Negative
• atypical urothelial cells AUC
• suspicious for high-grade urothelial
carcinoma
Suspicious
high-grade urothelial carcinoma HGUC
low-grade urothelial neoplasia (LGUN).
Urine Markers for Urothelial Cancer
• A test able to predict absence of
tumour will have great utility in
daily clinical practice .
• urinary cytology or biomarkers
can be used as an adjunct to
cystoscopy to detect missed
tumours, particularly CIS.
Cytology vs biopsy
cystoscopy
Cystoscopy and biopsy
• The diagnosis of papillary BC ultimately depends on cystoscopic
examination of the bladder and histological evaluation of sampled tissue
by either cold-cup biopsy or resection.
• Carcinoma in situ is diagnosed by a combination of cystoscopy, urine
cytology, and histological evaluation of multiple bladder biopsies .
Bladder biopsies
• Biopsies from suspicious urothelium should be taken.
• Carcinoma in situ can present as a velvet-like, reddish area,
indistinguishable from inflammation, or it may not be visible at all.
• patients with positive urine cytology, or with a history of HG/G3 NMIBC
and in tumours with non-papillary appearance, mapping biopsies from
normal-looking mucosa is recommended
• If equipment available, PDD is a useful tool to target the biopsy.
• The resection should be en bloc if <1cm tumour
TNM Staging
Pathologic
staging of
bladder
carcinoma
• Ta: Non invasive,
papillary
• Tis: Carcinoma in situ
• STAGE T1: lamina propria
invasion
• STAGE T2: Muscularis
propria invasion
STAGE 3
STAGE 3a:
microscopic
extravesicle
invasion
STAGE 3b:
grossly
apparent
extravesicle
invasion
STAGE T4:
invades
adjacent
structures
• NX- Not accessed
• N0-No LN.
• N1- single LN in
H.O.P.E.
• N2- Multiple LN in
H.O.P.E.
• N3- common iliac LN
Prostatic urethral biopsies
• Involvement of the prostatic urethra in men with NMIBC has been reported.
• Palou et al. showed that in 128 men with T1G3 BC, the incidence of CIS in the
prostatic urethra was 11.7% .
-with positive urine cytology but a negative bladder biopsy.
- recurrent bladder cancer after multiple courses of intravesical chemotherapy
-Prostatic urethra involvement is higher if the tumour is located at the trigone or
bladder neck, in the presence of bladder CIS and multiple tumours .
- biopsied if cystectomy with bladder reconstruction is under consideration
New methods of tumour visualisation
• As a standard procedure, cystoscopy and TURB are performed
using white light.
• However, the use of white light can lead to missing lesions
that are present but not visible, which is why new
technologies are being developed.
Photodynamic diagnosis
(fluorescence cystoscopy)
• fluorescence-guided biopsy
and resection are more
sensitive for the detection of
malignant tumours,
particularly for CIS .
• Patients with positive urine cytology, but normal looking bladder
mucosa, and those with recurrence and a history of high- grade
cancer.
• False-positivity can be induced by inflammation or recent TURB and
during the first three months after BCG instillation.
• One RCT has shown a reduction in recurrence and progression with
fluorescence guided TURB as compared to white light TURB . These
results need to be validated by further studies.
• It has been confirmed that fluorescence-guided biopsy and resection
are more sensitive than conventional procedures for the detection of
malignant tumours, particularly for CIS.
Narrow-band imaging
• is an optical image enhancement technology in which the narrow bandwidth
of light is strongly absorbed by Hb and penetrates only the surface of tissue,
increasing the visibility of hypervascular cancer tissue, in contrast to normal
urothelium.
• Improved cancer detection has been demonstrated by NBI flexible cystoscope
and NBI-guided biopsies and resection.
Additional technologies
1.Confocal laser micro-endoscopy
high resolution imaging probe designed
to provide endoscopic histological grading
in real time but requires further validation .
Additional technologies
2. Storz professional image enhancement
system (IMAGE1 S, formally called SPIES) is an image enhancement
system using four different light spectra but prospective data using this
system are lacking .
Non–Muscle-Invasive Bladder
Cancer
Epidemiology
• Approximately 70% of bladder tumors are
NMIBC at presentation
Campbell- Walsh Urology 12th edition ; Aldousari and Kassouf, 2010;
Ta: 70%
T1: 20%
CIS: 10%
TURBT: transurethral resection of
bladder tumor
• First-line to diagnose, stage, and treat visible tumors.
• Goal: to make the correct diagnosis and completely remove all visible lesions.
• EUA done before & after TURBT to asses disease extent & residual tumor.
• Muscle must be seen in TURBT specimen before ruling out invasive disease
• Biopsies of apparently uninvolved urothelium should be obtained to rule out occult Tis.
• Biopsy from the prostatic urethra is necessary in some cases
Steps to achieve a successful TURBT
Identifying the factors required to assign
• disease risk (number of tumurs, size, multifocality, characteristics, concern for the
presence of CIS, recurrent vs. primary tumour),
• clinical stage (bimanual examination under anaesthesia, assignment of clinical tumour
stage),
• adequacy of the resection (visually complete resection, visualisation of muscle at the
resection base), and
• presence of complications (assessment for perforation)
Surgical strategy of resection
• Piecemeal resection in fractions (separate
resection of the exophytic part of the tumour, the
underlying bladder wall and the edges of the
resection area) 1
• En-bloc resection using monopolar or bipolar
current, Thulium-YAG or Holmium-YAG laser. It
provides high quality resected specimens with
the presence of detrusor muscle in 96-100% of
cases 2
1. Richterstetter, M., et al. The value of extended transurethral resection of bladder tumour (TURBT) in the treatment of bladder cancer. BJU Int, 2012. 110:
E76.
2. Kramer, M.W., et al. Current Evidence of Transurethral En-bloc Resection of Nonmuscle Invasive Bladder Cancer. Eur Urol Focus, 2017. 3: 567.
Pathologist should comment on:
• Size
• tumour grade
• depth of tumour invasion,
• presence of CIS
• whether the detrusor muscle is present in the
specimen.
• specify the presence of LVI or unusual (variant)
histology
• If there is uncertainty over the pathology, a further
early re- resection (2-6 wk.) is indicated.
Prostatic urethral biopsies
• Patients with T1G3 Bladder Cancer, the incidence of
CIS in the prostatic urethra was 11.7% 1
• Take the biopsy from abnormal areas in the prostatic
urethra and from the precollicular area (between the 5
and 7 o’clock position) using a resection loop 1, 2
1. Palou, J., et al. Female gender and carcinoma in situ in the prostatic urethra are prognostic factors for recurrence, progression, and disease-specific mortality in T1G3 bladder cancer patients treated with
bacillus Calmette-Guerin. Eur Urol, 2012. 62: 118.
2. Mungan, M.U., et al. Risk factors for mucosal prostatic urethral involvement in superficial transitional cell carcinoma of the bladder. Eur Urol, 2005. 48: 760
Take a biopsy of the prostatic urethra
in cases
• bladder neck tumour,
• if bladder carcinoma in situ is present or suspected,
• if there is positive cytology without evidence of tumour in
the bladder,
• if abnormalities of the prostatic urethra are visible.
• If biopsy is not performed during the initial procedure, it
should be completed at the time of the second resection.
Brant, A., et al. Prognostic implications of prostatic urethral involvement in non-muscle-invasive bladder cancer. World J Urol, 2019. 37: 2683.
Second look TURBT?
Indications
• Residual disease after initial TURBT
• When specimen contained no muscle
• High-grade and/or T1 tumor
• Timing and strategy:
• Most recommend 2-6 weeks after initial TUR
• Should include resection of primary tumor
site
Cumberbatch, M.G.K., et al. Repeat Transurethral Resection in Non-muscle-invasive Bladder Cancer: A Systematic Review. Eur Urol, 2018
PREDICTING DISEASE RECURRENCE
AND PROGRESSION
• EORTC Genito-Urinary Cancer Group has
developed a scoring system and risk tables
• The basis for the scoring system are individual
patient data from 2,596 patients diagnosed with
TaT1 tumours, who were randomised into seven
EORTC trials
• Patients with CIS alone, undergo a second TURB
or receive maintenance BCG were not included.
Sylvester RJ, et al: Predicting recurrence and progression in individual patients with stage Ta T1 bladder cancer using EORTC risk tables. Eur Urol.2006;
INTRAVESICAL THERAPY
Perioperative Intravesical Therapy
• Single-dose intravesical chemotherapy administered
within 6 hours of resection reduces recurrence of low-risk
tumors 1, 2
• Mitomycin C (MMC) appears to be the most effective
adjuvant intravesical chemotherapeutic agent
perioperatively, epirubicin is used in Europe 1, 3
• Average recurrence rate was 54% in the TUR-alone group
versus 38% in the TUR-plus-MMC group 4
1. Bosscheiter et al., 2018,
2. uque and Loughlin, 2000; Isaka et al., 1992; Oosterlinck et al., 1993; Sekine et al., 1994; Solsona et al., 1999
3. Witjes and Hendricksen, 2008
4. Nilsson S, et al . A systematic overview of chemotherapy effects in urothelial bladder cancer. Acta Oncol. 2001
Sylvester et al., 2004: THE JOURNAL OF UROLOGY® 2004 ; A single immediate postoperative instillation of chemotherapy decreases the risk of recurrence in patients with stage
ta t1 bladder cancer: a meta-analysis of published results of randomized clinical trials
Mitomycin C
• MMC is an alkylating agent that inhibits DNA synthesis.
• The drug is usually instilled weekly for 6 to 8 weeks at
dose ranges from 20 to 60 mg.
• used for Low grade, Ta or T1 tumours, and recurrent
multifocal TCC
• single-​dose Intravesical therapy is equivalent to that
seen using weekly instillations for 6wk, post-​TURBT
Sylvester RJ, et al. (2004). A single immediate postoperative instillation of chemotherapy decreases the risk of recurrence in patients with stage TaT1 bladder cancer: a meta-​analysis. J Urol
• most studies shows MMC a viable option for
reduction in recurrence (but not for
progression) in light of its lesser side effects 1
• Adverse effect of MMC include Skin rash-
palmar desquamation, Irritative symptoms
and chemical cystitis (10%) and rarely,
contracted bladder
Huncharek et al., 2001, Anticancer research Journal ; Impact of intravesical chemotherapy on recurrence rate of recurrent superficial transitional
cell carcinoma of the bladder: results of a meta-analysis
Intravesical Immunotherapy: Bacille Calmette-Guérin
• Over 30 years’ successful application of
Bacillus Calmette Guerin (BCG) to the clinical
treatment of bladder cancer has proved it one
of the most promising immunotherapies for
cancer 1
• Intravesical BCG results in a robust local
immune response 2
• directly reacts to the tumor cells, causing
apoptosis, necrocytosis, oxidative stress, 1
1. Jiansong Han et al, 2020 ; Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect
2. Shen et al., 2008
Mechanism of action
• Initial step is direct binding to fibronectin within the bladder wall leading to direct
stimulation of cell-based immunologic response 1
• Numerous cytokines involved in the initiation or maintenance of inflammatory processes
including TNF-α, GM-CSF, IFN-γ, and IL-1, IL-2, IL-5, IL-6, IL-8, IL-10, IL-12, and IL-18 have
been detected in the urine of patients treated with intravesical BCG.1
• cytokine induction with preferential upregulation of IFN-γ, IL-2, and IL-12 reflects
induction of a T-helper type-1 (Th1) response 2
• This immunologic response activates cell-mediated cytotoxic mechanisms believed to
underlie the efficacy of BCG and other agents in the prevention of recurrence and
progression 2
1. Ludwig et al., 2004
2. Bohle and Brandau, 2003
Jiansong Han et al, 2020 ; Biomedicine & Pharmacotherapy Journal
Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect
The model of mechanisms of BCG in bladder cancer.
When BCG is exposed to tumor microenviroment, it attaches to the cell surface and be internalized by tumor cells to
active different pathways such as NF-KB. Cytokines will be released by some immune cells like nuetrophils and
macrophages to attend immune cascade or kill the tumor cells directly
• BCG powdered vaccine 80mg is reconstituted with 50 mL of saline
• typically started 2 to 4 weeks after resection, allowing time for re-
epithelialization of the bladder after TURBT, thereby minimizing the potential
for intravasation of live bacteria
• A urinalysis is usually performed immediately before instillation
• After instillation, the patient should retain the solution for at least 1 to 2 hours
• Fluid, diuretic, and caffeine restriction before instillation limits dilution of the
agent by urine and facilitates adequate retention of the agent for 2 hours
1. Lamm et al. 2011
2. Herr, 2012
3. Lamm et al., 2000b
BCG Prophylaxis to Prevent
Recurrence and Progression
Conclusion:
• In NMIBC several intravesical therapies are associated with a decreased risk
of recurrence and Progression vs transurethral bladder tumor resection
alone
Conclusion
In 403 patients with CIS, BCG reduced the risk of
progression by 35% compared with intravesical
chemotherapy.
Complications of BCG
Bacille Calmette-Guérin: Treatment
Schedule
• Several studies and AUA guidelines suggest that a 6-week induction course
• Durations of maintenance therapy based on risk stratification of the tumor 2
• Southwest Oncology Group (SWOG) reported the most significant impact of maintenance
therapy. Patients received a 6-week induction course followed by 3 weekly instillations at 3
and 6 months and every 6 months thereafter for 3 years.1
• intermediate-risk disease, a 1-year course of maintenance BCG was administered at
months 3, 6, and 12 and In patients with high-risk disease, the instillations were continued
every 6 months thereafter up to 3 years. 2
1. Chang et al., 2016
2. Oddens et al. 2013
Bohle and Bock,et al 2004, Intravesical bacille Calmette-Guérin versus mitomycin C in superficial bladder cancer: formal meta-analysis of
comparative studies on tumor progression
O’Donnell et al: Practical applications of intravesical chemotherapy and immunotherapy in high-risk patients with superficial bladder cancer. Urol Clin North Am 32:121–131, 2005
Role of “Early” Cystectomy
• Despite local therapy, many cases of high-grade NMIBC will progress to
invasion 1
• Patients of CIS in whom BCG unresponsiveness will have a 50% chance of
disease progression and potential for disease-specific mortality. 1
• Early (3-month) failure for T1 tumors after BCG is associated with an 82%
progression rate. 2
• Ten-year survival after cystectomy for non–muscle-invasive cancer can
range from 67% to 92%. 3
1. Catalona et al., 1987
2. Herr et al., 2000a
3. Lee et al., 2007; Schrier et al., 2004
Cystectomy / Radical cystectomy
consider in NMIBC
• high grade tumour
• invading deeply into lamina propria,
• lymphovascular invasion,
• diffuse CIS,
• Tumour in diverticula,
• Tumour involve the distal ureters or prostatic
urethra,
• Refractory to initial therapy,
• Tumour too large or anatomically inaccessible to
be removed in their entirety endoscopically.
Follow up
• TaT1 tumurs and carcinoma in situ (CIS) on regular cystoscopy.
• Patients with low-risk Ta tumours should undergo cystoscopy at
three months. If negative, subsequent cystoscopy is advised nine
months later, and then yearly for five years. 1
• Patients with high-risk tumours should undergo cystoscopy and
urinary cytology at three months. If negative, subsequent
cystoscopy and cytology should be repeated every three months
for a period of two years, and every six months thereafter until
five years, and then yearly. 2
Palou, J., et al. 2009
Soukup, V., et al. 2012
Holmang, S., et al. 2012
• Patients with intermediate-risk Ta tumours should have
an in-between (individualised) follow-up scheme using
cystoscopy. 1, 2
• Regular (yearly) upper tract imaging (computed
tomography-intravenous urography [CT-IVU] ) is
recommended for high-risk tumours. 1
• Cystoscopy under anaesthesia and bladder biopsies
should be performed when office cystoscopy shows
suspicious findings or if urinary cytology is positive 3
1. Holmang, S., et al. 2012
2. Soukup, V., et al. 2012
3. Niwa, N., et al. 2015
• During follow-up in patients with positive
cytology and no visible tumour in the bladder,
mapping-biopsies or PDD-guided biopsies and
investigation of extravesical locations (CT
urography, prostatic urethra biopsy) are
recommended.
• In patients initially diagnosed with TaLG bladder
cancer, use ultrasound of the bladder during
surveillance in case cystoscopy is not possible or
refused by the patient.
INDEX PATIENT NO. 1:
• ABNORMAL UROTHELIAL GROWTH BUT NOT PROVEN
CANCER
• Standard: Obtain biopsy to confirm grade for all index
patients.
• If possible, eradicate all visible tumors.
• If cancer, periodic cystoscopy.
• Option: Single dose of postoperative intravesical
chemotherapy
INDEX PATIENT NO. 2:
• SMALL-VOLUME, LOW-GRADE Ta
• Recommendation: Single dose of
postoperative intravesical chemotherapy.
INDEX PATIENT NO. 3:
• MULTIFOCAL OR LARGE LOW-GRADE Ta, OR
RECURRENT LOW-GRADE Ta
• Recommendation: Intravesical BCG or MMC—goal
to prevent/ delay recurrence.
• Option: Maintenance BCG or MMC.
INDEX PATIENT NO. 4:
• HIGH-GRADE Ta, T1, OR CIS
• Standard: If T1 disease, but no muscularis in
specimen, repeat resection.
• Recommendation: Intravesical BCG with
maintenance therapy.
• Option: Consider cystectomy for select patients.
INDEX PATIENT NO. 5:
• HIGH-GRADE Ta, T1, AND/OR CIS AFTER PRIOR
INTRAVESICAL THERAPY
• Standard: T1 disease but no muscularis in specimen,
repeat resection.
• Recommendation: Consider cystectomy as therapeutic
alternative.
• Option: Further intravesical therapy may be
considered.
Bladder biopsies
• biopsies from suspicious urothelium should be
taken
• Patients with positive urine cytology, or with a
history of HG NMIBC and in tumors with non-
papillary appearance, mapping biopsies from
normal-looking mucosa is recommended 1
• biopsies should be taken from the trigone,
bladder dome, right, left, anterior and posterior
bladder wall 1,2
1. Hara, T., et al. Risk of concomitant carcinoma in situ determining biopsy candidates among primary non-muscle-invasive bladder cancer patients: retrospective analysis . Int J Urol, 2009.
2. van der Meijden, A., et al. Significance of bladder biopsies in Ta,T1 bladder tumors: a report from the EORTC Genito-Urinary Tract Cancer Cooperative Group. EORTC-GU Group Superficial Bladder
Committee. Eur Urol, 1999.
Intravesical Immunotherapy:
Bacille Calmette-Guérin
Introduction
• Over 30 years’ successful application of
Bacillus Calmette Guerin (BCG) to the clinical
treatment of bladder cancer has proved it one
of the most promising immunotherapies for
cancer 1
• Intravesical BCG results in a robust local
immune response 2
• directly reacts to the tumor cells, causing
apoptosis, necrocytosis, oxidative stress, 1
1. Jiansong Han et al, 2020 ; Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect
2. Shen et al., 2008
• Intravesical BCG is a live, attenuated mycobacteria and therefore has the
potential risk for transmission.
• Urine Routine and culture should be done before installation
• The preparation, handling and disposal should bring with it the same
precautions of other biohazardous materials.
• BCG powdered vaccine 80mg is reconstituted with 50 mL of saline
• Fluid, diuretic, and caffeine restriction before instillation limits dilution
of the agent by urine and facilitates adequate retention of the agent for
2 hours
1. Lamm et al. 2011
2. Herr, 2012
3. Lamm et al., 2000b
Administration procedure:
1. Assemble equipment on trolley as above.
2. Reconstitute BCG using closed system equipment as per
manufacturers’ instructions. BCG should always be given within 2
hours of mixing.
3. Place both plastic and linen draw sheet underneath patient’s
buttocks.
4. Insert urethral catheter as per policy and drain bladder
5. A plastic backed sheet should be placed under the catheter
connection and across the patient to prevent the spillage of BCG
onto the patient or bedding if there is a leak.
6. Instil BCG into patient’s bladder in adherence to the
manufacturer’s instructions for using closed system
products.
7. Remove catheter carefully and advise the patient they
are to retain liquid in bladder for up to two hours
following instillation.
8. All efforts should be made to ensure the intravesical
drugs do not come into contact with the skin, clothing or
other surfaces.
9. Following insertion of intravesical therapeutic agents, the patient should lie
prone, supine left lateral and right lateral for 15 minutes each. The drug needs
to remain in the patient’s bladder for at least 1 hour (to a maximum of 2 hours).
10. equipment, in contact with cytotoxic material, should be disposed of into 2
cytotoxic waste bags, labelled and secured closed with cytotoxic tape and
disposed of in the clinical waste for incineration.
11. Following completion of the treatment, the patient should be advised to void
into the designated toilet.
12. The toilet should not be flushed. Two cups of bleach should be poured into the
toilet bowl and left for 20 minutes prior to flushing. Patients should be advised
to continue to use bleach in the toilet bowl with each void for 6 hours following
treatment.
13.The patient should be encouraged to drink 2-3 litres of
fluid for the first 24 hours following treatment to
encourage elimination of absorbed drugs.
14.Urine samples should not routinely be sent to the
laboratory within 72 hours of treatment.
15.The patient should be given instructions on after care,
their next appointment and contact details should they
encounter any problems prior to leaving the
department.
Mechanism of action
• Initial step is direct binding to fibronectin within the bladder wall leading to direct
stimulation of cell-based immunologic response 1
• Numerous cytokines involved in the initiation or maintenance of inflammatory processes
including TNF-α, GM-CSF, IFN-γ, and IL-1, IL-2, IL-5, IL-6, IL-8, IL-10, IL-12, and IL-18 have
been detected in the urine of patients treated with intravesical BCG.1
• cytokine induction with preferential upregulation of IFN-γ, IL-2, and IL-12 reflects
induction of a T-helper type-1 (Th1) response 2
• This immunologic response activates cell-mediated cytotoxic mechanisms believed to
underlie the efficacy of BCG and other agents in the prevention of recurrence and
progression 2
1. Ludwig et al., 2004
2. Bohle and Brandau, 2003
Jiansong Han et al, 2020 ; Biomedicine & Pharmacotherapy Journal
Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect
The model of mechanisms of BCG in bladder cancer.
When BCG is exposed to tumor microenviroment, it attaches to the cell surface and be internalized by tumor cells to
active different pathways such as NF-KB. Cytokines will be released by some immune cells like nuetrophils and
macrophages to attend immune cascade or kill the tumor cells directly
BCG Prophylaxis to Prevent
Recurrence and Progression
Conclusion:
• In NMIBC several intravesical therapies are associated with a decreased risk
of recurrence and Progression vs transurethral bladder tumor resection
alone
Conclusion
In 403 patients with CIS, BCG reduced the risk of
progression by 35% compared with intravesical
chemotherapy.
Adverse effect
• Local
• Systemic
Symptoms of cystitis and LUTS
• frequency, dysuria and occasional mild haematuria. These
symptoms usually subside within 24 to 48 hours
• Phenazopyridine, or non-steroidal anti-inflammatory drugs
(NSAIDs).
• If symptoms improve within a few days: continue
instillations.
• If symptoms persist or worsen:
• Postpone the instillation
• Perform a urine culture
• Start empirical antibiotic treatment
If symptoms persist even with antibiotic treatment:
• With positive culture: adjust antibiotic treatment
according to sensitivity
• With negative culture: quinolones and potentially
analgesic anti-inflammatory instillations once daily for
5 days (repeat cycle if necessary) .
• If symptoms persist: anti-tuberculosis drugs +
corticosteroids.
• If no response to treatment and/or contracted bladder:
radical cystectomy.
Haematuria
• Perform urine culture to exclude
haemorrhagic cystitis, if other symptoms
present.
• If haematuria persists, perform cystoscopy to
evaluate presence of bladder tumour
Symptomatic granulomatous
prostatitis
• Symptoms rarely present: perform urine culture.
• Quinolones is treatment of choice
• If quinolones are not effective: isoniazid (300
mg/day) and rifampicin (600 mg/day) for three
months.
• Cessation of intravesical therapy.
Epididymo-orchitis
• Perform urine culture and administer
quinolones.
• Cessation of intravesical therapy.
• Orchidectomy if abscess or no response to
treatment.
Arthritis
• Rare complication and considered
autoimmune reaction.
• Arthralgia and arthritis : treatment with
NSAIDs.
• If no/partial response, proceed to
corticosteroids, high-dose quinolones or
antituberculosis drugs.
Persistent high-grade fever
• (> 38.5°C for > 48 h)
• Permanent discontinuation of BCG instillations.
• Immediate evaluation: urine culture, blood tests, chest
X-ray.
• Prompt treatment with more than two antimicrobial
agents while diagnostic evaluation is conducted.
• Consultation with an infectious diseases specialist.
BCG sepsis
• Evaluation: total count, urine culture, chest X-ray, ESR, CRP
• Cessation of BCG.
• For severe infection:
• High-dose quinolones or isoniazid, rifampicin and
ethambutol
• Start ATT for 6 months
• Early, high-dose corticosteroids as long as symptoms
persist.
• Consider an empirical non-specific antibiotic to cover
Gram-negative bacteria and/or Enterococcus.
Allergic reactions
• Antihistamines and anti-inflammatory agents.
• Consider high-dose quinolones or isoniazid
and rifampicin for persistent symptoms.
• Delay therapy until reactions resolve
Bacille Calmette-Guérin: Treatment
Schedule
• Several studies and AUA guidelines suggest that a 6-week induction course 1
• Durations of maintenance therapy based on risk stratification of the tumor 2
• Southwest Oncology Group (SWOG) reported the most significant impact of
maintenance therapy. Patients received a 6-week induction course followed by 3
weekly instillations at 3 and 6 months and every 6 months thereafter for 3
years.1
• intermediate-risk disease, a 1-year course of maintenance BCG was administered
at months 3, 6, and 12. 2
1. Chang et al., 2016
2. Oddens et al. 2013
BCG-refractory tumour
• If T1G3/HG tumour is present at 3 months . Further
conservative treatment with BCG is associated with an
increased risk of progression
• If TaG3/HG tumour is present after 3 months and/or at 6
months, after either re-induction or first course of
maintenance.
• If CIS (without concomitant papillary tumour) is present at
3 months and persists at 6 months after either re-induction
or first course of maintenance. If patients with CIS present
at 3 months, an additional BCG course can achieve a
complete response in > 50% of cases
• If HG tumour appears during BCG maintenance therapy
BCG-relapsing tumour
• Recurrence of G3/HG tumour after
completion of BCG maintenance, despite an
initial response
• Radical cystectomy or repeat BCG course
according to individual situation.
• Bladder-preserving strategies
BCG unresponsive tumour
• BCG refractory or T1Ta/HG BCG recurrence
within 6 months of completion of adequate
BCG exposure
• or
• Development of CIS within 12 months of
completion of adequate BCG exposure
• Radical cystectomy or bladder preservation
strategy
Muscle invasive bladder cancer
MUSCLE INVASIVE
Overview
• 20% to 30% of patients will present with muscle-invasive bladder cancer
at the time of initial presentation.
• 20% will progress to muscle-invasive disease after an initial diagnosis of
non–muscle-invasive bladder cancer.
• 30% of patients diagnosed with MIBC have undetected metastasis at the
time of treatment of primary tumor.
• 25% of patients submitted to radical cystectomy present with lymph node
involvement at the time of surgery.
IMAGING IN MIBC
• optimal to obtain cross-sectional imaging before TUR.
• if imaging is obtained subsequently, it should be delayed approximately 7
days post-procedure to minimize inflammatory artifact, which can be mistaken
for T3 disease (Kim et al, 2004).
• Both CT & MRI cannot accurately diagnose microscopic invasion of perivesical
fat (T2 vs T3a).
• aim of CT or MRI is therefore to detect T3b disease or higher.
• pelvis nodes > 8mm and abdominal nodes >10mm in maximum short-axis
diameter is regarded as enlarged on CT or MRI.
ROLE OF PET IN DISTANT METS
• Evidence is accruing in the literature suggesting that 18F-
fluorodeoxyglucose (FDG)-positron emission tomography
(PET)/CT might have potential clinical use for staging
metastatic BC but there is no consensus yet.
• The results of further trials are awaited before a
recommendation can be made.
Magnetic resonance imaging is more sensitive and
specific for diagnosing bone metastases than bone
scintigraphy.
• Conclusion: Whole-body MR imaging for the evaluation of metastases
compared well with the reference techniques for cerebral, pulmonary, and
hepatic lesions. Whole-body MR imaging was more sensitive in the
detection of hepatic and osseous metastases than were the reference
techniques.
NEOADJUVANT CHEMOTHERAPY FOR MUSCLE-
INVASIVE BLADDER CANCER
• Advantages
1. chemotherapy is often better tolerated before
surgery-delay in chemotherapy after surgery
due to complications or debilitation.
2. Patients with micrometastatic disease.
3. downstage bulky and locally advanced tumors
increasing likelihood for negative surgical
margins.
4. allows the clinician to assess each individual’s
response to therapy.
NAC
Disadvantage:
- chemotherapy is a delay in definitive local
therapy for patients who do not respond to
chemotherapy and thus experience disease
progression.
NEOADJUVANT CHEMOTHERAPY FOR
MUSCLE-INVASIVE BLADDER CANCER
• 50% of patients with muscle-invasive bladder cancer treated with
cystectomy alone will progress to metastatic disease (Stein et al, 2001;
Ghoneim et al, 2008).
•
Is NAC really beneficial for T2 or
less???
• 526 patients in 3 arms
- No NAC
- partial NAC
- complete NAC
•
• Cisplatin-based neoadjuvant chemotherapy is associated with an overall
survival advantage of 5% to 6% and a pathologic complete response rate
of 30% to 40%.
RADICAL CYSTECTOMY AND PELVIC LYMPH
NODE DISSECTION
• Patients with clinical T2-T4a, N0, M0 disease, remains the gold standard
therapy.
• Time from diagnosis MIBC to cystectomy likely impacts oncologic
outcomes, particularly if there is a delay of greater than 12 weeks
Sanchez-Ortiz and colleagues (2003)
Radical cystectomy in NMIBC
1. are high grade and invading deeply into lamina propria
2. exhibit lymphovascular invasion
3. associated with diffuse CIS
4. diverticula
5. substantially involve the distal ureters or prostatic urethra
6. refractory to initial therapy
7. too large or anatomically inaccessible to be removed entirety
endoscopically.
Radical cystectomy indications
in MIBC and others
• MUSCLE INVASIVE
• T2-T4a.N0, N0, M0 disease
• OTHERS
• Non urothelial carcinomas (squamous, adeno)
• non responders to conservative therapy
• Recurrences after bladder sparing treatments
• Palliative intervension- fistula formation,pain,recurrent visible
haematuria
CONTRAINDICATIONS-
CYSTECTOMY
1. Unresectable - lymph node metastases.
2. Bulky lymph node with extensive periurethral disease.
3. Bladder is fixed to the pelvic sidewall, or invading the recto sigmoid
colon.
RADICAL CYSTECTOMY
• Technique-removal of bladder and adjacent organs
• Male- removal of prostate, seminal vesicles
• Female- removal of uterus,cervix,vagina and ovary
URETHRECTOMY INDICATIONS
• Positive margin at the level of urethral dissection.
• Primary tumor is located at bladder neck or in urethra.
• Extensive infiltration of prostate.
Consent
• Pt is explained about his/her disease and the
diagnosis MIBC
• The need for surgery
• The prognosis (5 yr survival 50-60%)
• Organ removed – bladder, - prostate, seminal vesicles
• Pt is explained about ileal conduit & complication & stoma
care
• VAS deferens ligation
• Erectile dysfn
• Gen complications: infection,bleeding,trauma and others
Pre Op
Prep
1. Blood reservation
2. Only liquid diet from morning on the day before
surgery
3. Oval peglec at 12 to noon
4. NBM 12:00 midnight
5. Ileostomy site marking
6. Inform pathology dept for frozen section preparation
7. Part preparation nipple to knee.
On the day of sx
Morning - serum electrolytes, pulse /BP/RBS
- Antibiotics -cephalosporin +Metronidazole
Pre Op Prep
1. Blood reservation
2. Only liquid diet from morning on the day before
surgery
3. Oral peglec at 12 to noon
4. Nil By Mouth,12:00 midnight
5. Ileostomy site marking
6. Inform pathology dept for frozen section preparation
7. Part preparation nipple to knee.
- On the day of surgery serum electrolytes, RBS
- Antibiotics - Cephalosporin +Metronidazole
MAIN STEPS
• POSITION
• INCISION
• ABDOMINAL EXPLORATION
• BOWEL MOBILIZATION
• URETERAL DISSECTION
• PELVIC LYMPHADENECTOMY
• LIGATION OF LATERAL VASCULAR PEDICLE
• LIGATION OF POSTERIOR VASCULAR PEDICLE
• ANTERIOR ,APICAL DISSECTION
Position
• Hyper extended supine position with iliac crest
located below the fulcrum of operating table
• The legs are slightly abducted
Incision
• Vertical midline incision
• Incision should be carried
lateral to umbilicus on the
contralateral side of stoma
site
• While opening of posterior
rectus sheath ,care should
be taken to remove the
urachus en bloc with
bladder
Abdominal Exploration
• Look for extent and resectability
• Hepatic metastasis
• Gross regional and retroperitoneal
lymphadenopathy
Ureteral resection
• Ureters are dissected in to deep pelvis(several
cm beyond the iliac vessels) and divided
between two large hemo clips
• Proximal cut end of ureteral segment is send for
frozen section
• Leaving the proximal hemo clip on divided
ureter allows for hydro static ureteral dilation
and facilitates uretero enteric anastomoses
Pelvic Dissection
Blood supply of bladder
• lateral pedicle
- Superior vesicle artery
- Inferior vesicle artery
• Posterior pedicle
• Superior & inferior vesicle
arteries are branch of
anterior division of Int iliac
Artery.
• Posterior pedicle is
branch of posterior
division of Internal
iliac Artery.
Control DVC
vicryl 1-0 or 1 number
and apply “figure of
eight suture” on DVC
complex and fix it to
pubic
symphysis
Anatomic Extent of Pelvic Lymph Node Dissection
and Landing Zones
Standard LN dissection
Extended LN dissection
• Completed extended pelvic lymph node
dissection
• 5-year recurrence-free survival of patients with lymph node positive
disease was
- 7% for limited
- 35% for extended node dissection
• It is recommend that an adequate pelvic lymph node dissection at a
minimum includes all lymphatic tissue around the common iliac,
intercommon iliac, internal iliac, and obturator packets bilaterally.
• It has also been suggested that frozen-section analysis be performed for
the lymph nodes in the true pelvis, and if metastasis is not identified, a
more superior dissection can be omitted.
Number of Lymph Nodes Removed at
the Time of Cystectomy
• -50% if 15-25 nodes
• -75% if 25 nodes
• - 90% if 45 nodes
• (suggesting 25 node
minimum).
Lymph Node Density and
Extracapsular Nodal Extension
• Lymph node density refers to the percentage of positive nodes relative to
the total number of nodes removed.
• Herr (2003) and colleagues) In their study of 162 patients with lymph node
positive bladder cancer patients who had a lymph node density of less
than 20%, these patients experienced a significantly better 5-year disease-
specific survival following radical cystectomy.
• Seiler and colleagues (2011) reported an extranodal extension to be an
independent predictor of overall survival and disease-specific survival in a
smaller cohort (n=162) of lymph node positive patients.
Intraoperative Decision Making
A. Grossly Positive Nodes and T4b Disease
-Cystectomy is not performed
1. when lymph node metastases are unresectable because of bulk,
2. when there is evidence of extensive periureteral disease,
3. when the bladder is fixed to the pelvic sidewall
4. when the tumor is invading the rectosigmoid colon
Intraoperative Decision Making
B.Intraoperative Frozen Sections of the Ureter
• The incidence of involvement of the distal ureter with tumor on final
pathology at the time of radical cystectomy was 6% to 8% (Gakis et al,
2011).
• Final ureteral margin status has proven to be an independent predictor of
upper tract recurrence following cystectomy (Tran et al, 2008; Volkmer et
al, 2009).
• role of intraoperative frozen-section analysis of the ureters at the time of
cystectomy remains somewhat controversial.
Urinary diversion after radical cystectomy
Orthotopic
Orthotopic bladder substitution
Heterotopic
• Continent
Right colonic pouches-Indiana,Florida,Miami,Penn Ileal pouches-
Kock,Mainz Caecum & ascending colon-Mainz I
• Non continent
Ileal/colonic conduit Cutaneous ureterostomy
• Diversion in to GIT
Uretrosigmoidostomy/Rectal bladder-Manz II,Mansuora rectal bladder
Ileal conduit urinary diversion
Originally described by Zaayer in 1911, popularised by Bricker in early 1950s
Reliable, easily performed procedure which has stood test of time
Typically 10-15 cm of ileum, 10-15cm from ileocaecal valve
Contraindications:
Short bowel syndrome
Inflammatory bowel disease
Pelvic irradiation
Oncologic Outcomes following
Radical Cystectomy
.
• Lymph node status appears to be the single
greatest predictor of disease outcome.
ADJUVANT CHEMOTHERAPY FOR
MUSCLE-INVASIVE BLADDER CANCER
• Patients with pT3-T4 or node-positive disease are known to be at high
risk for failure following cystectomy.
• A major limitation of adjuvant chemotherapy is that it is often difficult or
impossible for patients to undergo systemic therapy following cystectomy
secondary to surgical deconditioning, deteriorating renal function, or
perioperative complications (Donat et al, 2009).
Randomised trails of adjuvant chemo
• The EUA guidelines currently recommend
adjuvant chemotherapy within clinical trials but
not as a routine therapeutic option
Partial cystectomy
• First, a full pelvic lymphadenectomy can be performed that allows for
complete staging. Second, the full thickness of bladder wall and associated
perivesical fat can be removed.
• Ideal candidates for partial cystectomy include those with small, solitary
tumors amenable to wide resection with 2-cm margins. Ideally the tumor
should be away from the ureteral orfices to avoid reimplantation.
• complete resection while maintaining adequate functional bladder
capacity
• The presence of CIS is considered by most to be a contraindication to
partial cystectomy, and random bladder biopsies can be performed
preoperatively.
• The MSKCC group has also recommended the routine use of
intraoperative frozen sections and proceeding with radical cystectomy if a
negative margin cannot be achieved (Holzbeierlein et al, 2004).
Multimodality bladder-preserving
treatment
• trimodality treatment combines TURB, chemotherapy and RT
• The aim of MMT is to preserve the bladder and QoL without
compromising oncological outcome.
• Patients who are medically unfit for surgery or who refuse surgery can be
considered for bladder preservation.
Metastatic urothelial cancer
Time schedule for surveillance
• EAU Guidelines
- CT scan (every 6 months) until the third year, followed by annual imaging
thereafter.
- CT scan of the UUT(Patients with multifocal disease, NMIBC with CIS or
positive ureteral margins are at higher risk of developing UTUC, which can
develop late (> 3 years)).
Follow-up of functional outcomes and
complications
• The functional complications are diverse :
vitamin B12 deficiency metabolic acidosis
worsening of renal function urinary infections
urolithiasis stenosis of uretero-intestinal
anastomosis
stoma complications in
patients with ileal conduit
neobladder continence
problems
emptying dysfunction risk of fractures
Urinary bladder carcinoma

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Urinary bladder carcinoma

  • 1. Bladder Cancer Presented by Dr. Hari Prasad Baral Dr. Rojan Adhikari Shahid Dhrma Bhakta National Transplant Center
  • 2.
  • 4. • BENIGN TUMORS OF THE BLADDER 1. Epithelial metaplasia 2. Leukoplakia 3. Inverted papilloma 4. Nephrogenic adenoma 5. Leiomyoma 6. Cystitis cystica 7. Cystitis glandularis.
  • 5. Epithelial Metaplasia • focal areas of transformed urothelium with normal nuclear and cellular architecture surrounded by normal urothelium usually located on the trigone. • Approximately 40% of women and 5% of men have squamous metaplasia of the bladder, which is usually related to infection, trauma, or surgery (Ozbey et al, 1999). • Treatment is unnecessary, and a preventive agent has not been identified.
  • 6. Types of epithelial metaplasia Squamous metaplasia - often has a knobby appearance and is covered by white, flaky, easily disrupted material lying on the trigone. Glandular metaplasia - appears as clumps of raised red areas that appear inflammatory and are often confused for cancer
  • 7. Leukoplakia • keratin deposition that appears as a white flaky substance floating in the bladder (Staack et al, 2006). • occurs in other organs that are covered by squamous epithelium. • often premalignant (Zhang et al, 2009). • cytogenetic studies are consistent with a benign lesion. • no treatment.
  • 8. Inverted Papilloma • benign proliferative lesion associated with chronic inflammation or BOO and can be located throughout the bladder but most commonly on the trigone • comprising less than 1% of all bladder tumors • The use FISH to evaluate chromosomal changes can distinguish between an inverted papilloma and a urothelial cancer (Jones et al, 2007). • Transurethral resection is the treatment of choice
  • 9. Papilloma • composed of delicate stalks lined by normal-appearing urothelium • rarely have mitotic figures and lack markers of aggressive growth such as P53 or RB mutations, but 75% of these tumors have mutations in FGFR-3. • Papillomas may recur • but they do not progress or invade.
  • 10. Nephrogenic Adenoma • • rare tumor caused by chronic irritation of the urothelium. • lesion may be vascular, which explains the presence of gross hematuria (Franke et al, 2011). • 2 school of thoughts on origin: 1.chronic inflammation causing metaplastic changes to the urothelium lead to nephrogenic adenoma 2.arises from displaced mesonephric tissue in the urothelium that is activated with mucosal injury. • Treatment is transurethral resection and elimination of irritation.
  • 11. Cystitis Cystica and Glandularis • a common finding associated with inflammation or chronic obstruction. • cystic nests that are lined by columnar or cuboidal cells and are typically associated with proliferation. • Cystitis glandularis can be associated with pelvic lipomatosis and may occupy the majority of the bladder (Buckley et al, 2007). • voiding symptoms and hematuria. • Treatment is transurethral resection and relief of the obstruction or inflammatory condition.
  • 12. Leiomyoma • most common nonepithelial benign tumor • Leiomyomas appear as smooth indentations of the bladder and can be confused with a bladder tumor • MRI can confirm the diagnosis and spare invasive procedures (Fasih et al, 2008). • Surgical resection is required if the leiomyoma is large or painful.
  • 13. UROTHELIAL CANCER • Epidemiology • American Cancer Society statistics: - 72,570(54,610 men and 17,960 women) and accounting for 7% of all cancers. • 3% of all cancer deaths (Siegelet al, 2013)
  • 14. Gender, Racial, and Age Differences • M:F::3-4:1 • White> black • peaks in 8th decade
  • 15. Global Burden of Bladder Cancer • highest occurring in Southern and Eastern Europe, parts of Africa, the Middle East, and North America, and the lowest occurring in Asia and underdeveloped areas in Africa. • In North America and Europe, - 95% to 97% of cases are urothelial carcinoma • Africa 60% to 90% are urothelial and 10% to 40% are squamous cell.
  • 16. Etiology  Genetic abnormalities  External risk factors, • carcinogen exposure, • smoking • nutritional factors, • fluid intake, • alcohol, • inflammation, • infection, • chemotherapy, • radiation, • artificial sweeteners
  • 17. Genetic Factors • are related to susceptibility to environmental carcinogens. • N-acetyltransferase (NAT) detoxifies nitrosamines, a known bladder carcinogen. • slow NAT-2 polymorphism is related to bladder cancer with an odds ratio of 1.4 compared with the fast polymorphism (Garcia-Closas et al, 2005). • Glutathione-S-transferase (GSTM1) conjugates several reactive chemicals, including arylamines and nitrosamines. • Null GSTM1 polymorphism is associated with an increased risk with a relative risk of 1.5 (Garcia-Closas et al, 2005).
  • 18. Hereditary • First-degree relatives have a twofold increased risk (Kiemeney, 2008). • risk is higher for women and nonsmokers. • not associated with bladder cancer formation at an earlier age. • no clear mendelian inheritance patterns, making classic linkage studies impossible. • inherited low penetetrance genes makes a person more susceptible to carcinogenic exposure, thus of bladder cancer formation.
  • 19.
  • 20. Smoking • Tobacco(cigratte smoking) accounts for 60% and 30% of all urothelial cancers in males and females, respectively ( Freedman et al, 2011) • Relative risk is 2.8 and 2.73 in men and women, respectively • Two to six times greater chance of developing urothelial cancer with smoking • Intensity and duration of smoking are related to the increased risk. • The risk of secondhand smoke is low and not statistically different from that for nonsmokers.
  • 21. Nutritional Factors Most nutrients or other metabolites are excreted in the urine and have prolonged contact with the urothelium. Preventive(detoxification.) • fruits and vegetables(citrus fruits, apples, berries, tomatoes, carrots, and cruciferous) • Micronutrients (antioxidants) including vitamins A, C, and E; selenium; and zinc causing or promoting • salted and barbequed meat, • pork • total fat • pickled vegetables • soy • spices • coffee • tea
  • 22. Analgesic Abuse. • acetaminophen or phenacetin (5 to 15 kg during a 10-year period) have been associated with an increased risk of bladder cancer .
  • 23. Infection • squamous cell carcinoma in patients chronically infected with Schistosoma haematobium. • a possible link between human papillomavirus (HPV) and urothelial cancer formation. • HPV encodes two oncoproteins, E6 and E7. E6 interacts with TP53, which has a role in bladder cancer progression and formation (Westenend et al, 2001). • Potential carcinogens were produced with chronic UTI.
  • 24. Radiation. • association between radiation exposure and bladder cancer formation is primarily based on atomic bomb survivors during World War II. • Further support that radiation can cause bladder cancer is an increased risk of urothelial cancer in patients with prostate or cervical cancer who were treated with radiation therapy.
  • 25. Chemotherapy Chemotherapy destroys malignant cells by causing • significant DNA and cellular damage on rapidly dividing urothelium. • The only chemotherapeutic agent that has been proven to cause bladder cancer is cyclophosphamide ( Nilsson and Ullen, 2008). • Phosphoramide mustard is the mutagenic metabolite that causes bladder cancer in patients exposed to cyclophosphamide.
  • 26. Occupational exposure • second most important risk factor for BC( accounting for about 10% of all cases) • The primary culprits are the aromatic amines that bind to DNA. • benzidine , β-naphthylamine ,aromatic amines, polycyclic aromatic hydrocarbons, diesel exhaust and chlorinated hydrocarbons. • mainly in industrial plants, which process paint, rubber, dye, metal and petroleum products.
  • 27. symptoms • Gross, painless hematuria is the primary symptom in 85% of patients with a newly diagnosed bladder tumor, and microscopic hematuria occurs in virtually all patients (Khadra et al, 2000;Alishahi et al, 2002; Wallard et al,2006). • Carcinoma in situ with irritative LUTS Vs large mass obstrutive LUTS. • suprapubic pain, recurrent UTI, pneumaturia • Urachal adenocarcinomas - a blood or mucus umbilical discharge or a deep sub- umbilical mass. • Advanced bladder cancer - lower limb swelling due to lymphatic/ venous obstruction, bone pain, weight loss, anorexia, confusion. • anuria (renal failure due to bilateral ureteric obstruction).
  • 28. Signs • General examination may reveal pallor, indicating anaemia due to blood loss or chronic renal impairment. • Abdominal examination may reveal a suprapubic mass in the case of locally advanced disease; DRE may reveal a pelvic mass above, or involving, the prostate. • If this mass is mobile (best assessed on bimanual examination under GA) • bimanual examination is mandatory before and after bladder tumour resection to assess size, position, and mobility (i.e. stage)
  • 29. Ultrasound • Primary screening modality Permits: • visualisation of intraluminal mass with vasularity on color doppler • detection of hydronephrosis(uo or distal ureter involvement) • ? lymphnode status • but cannot rule out all potential causes of haematuria
  • 30. Computed tomography . urography • detect papillary tumours in the urinary tract, indicated by filling defects and/or hydronephrosis. • provides more information (including status of lymph nodes and neighbouring organs). • useful for staging
  • 31. magnetic resonance imaging (MRI) • MRI has not yet been established in BC diagnosis and staging. • A standardised methodology of MRI reporting in patients with BC was recently published but requires validation . • A diagnosis of CIS cannot be made with imaging methods alone (CT urography, IVU, US or MRI).
  • 32. Urinary cytology • has high sensitivity in G3 and high-grade tumours (84%), but low sensitivity in G1/LG tumours (16%) • The sensitivity in CIS detection is 28-100% . • Positive voided urinary cytology can indicate an urothelial carcinoma anywhere in the urinary tract. • false- positive cytology can arise due to infection, inflammation, stones, instrumentation, and intravesical instillations such as chemotherapy. • negative cytology, however, does not exclude its presence.
  • 34. urinary cytology diagnostic categories • Urine collection should respect the recommendation. • In patients with suspicious cytology repeat investigation is advised . Paris Working Group :2016 • adequacy of urine specimens Adequacy • negative for high-grade urothelial carcinoma Negative • atypical urothelial cells AUC • suspicious for high-grade urothelial carcinoma Suspicious high-grade urothelial carcinoma HGUC low-grade urothelial neoplasia (LGUN).
  • 35. Urine Markers for Urothelial Cancer • A test able to predict absence of tumour will have great utility in daily clinical practice . • urinary cytology or biomarkers can be used as an adjunct to cystoscopy to detect missed tumours, particularly CIS.
  • 38. Cystoscopy and biopsy • The diagnosis of papillary BC ultimately depends on cystoscopic examination of the bladder and histological evaluation of sampled tissue by either cold-cup biopsy or resection. • Carcinoma in situ is diagnosed by a combination of cystoscopy, urine cytology, and histological evaluation of multiple bladder biopsies .
  • 39. Bladder biopsies • Biopsies from suspicious urothelium should be taken. • Carcinoma in situ can present as a velvet-like, reddish area, indistinguishable from inflammation, or it may not be visible at all. • patients with positive urine cytology, or with a history of HG/G3 NMIBC and in tumours with non-papillary appearance, mapping biopsies from normal-looking mucosa is recommended • If equipment available, PDD is a useful tool to target the biopsy. • The resection should be en bloc if <1cm tumour
  • 42. • Ta: Non invasive, papillary • Tis: Carcinoma in situ
  • 43. • STAGE T1: lamina propria invasion
  • 44. • STAGE T2: Muscularis propria invasion
  • 49. • NX- Not accessed • N0-No LN. • N1- single LN in H.O.P.E. • N2- Multiple LN in H.O.P.E. • N3- common iliac LN
  • 50. Prostatic urethral biopsies • Involvement of the prostatic urethra in men with NMIBC has been reported. • Palou et al. showed that in 128 men with T1G3 BC, the incidence of CIS in the prostatic urethra was 11.7% . -with positive urine cytology but a negative bladder biopsy. - recurrent bladder cancer after multiple courses of intravesical chemotherapy -Prostatic urethra involvement is higher if the tumour is located at the trigone or bladder neck, in the presence of bladder CIS and multiple tumours . - biopsied if cystectomy with bladder reconstruction is under consideration
  • 51. New methods of tumour visualisation • As a standard procedure, cystoscopy and TURB are performed using white light. • However, the use of white light can lead to missing lesions that are present but not visible, which is why new technologies are being developed.
  • 52. Photodynamic diagnosis (fluorescence cystoscopy) • fluorescence-guided biopsy and resection are more sensitive for the detection of malignant tumours, particularly for CIS .
  • 53. • Patients with positive urine cytology, but normal looking bladder mucosa, and those with recurrence and a history of high- grade cancer. • False-positivity can be induced by inflammation or recent TURB and during the first three months after BCG instillation. • One RCT has shown a reduction in recurrence and progression with fluorescence guided TURB as compared to white light TURB . These results need to be validated by further studies. • It has been confirmed that fluorescence-guided biopsy and resection are more sensitive than conventional procedures for the detection of malignant tumours, particularly for CIS.
  • 54. Narrow-band imaging • is an optical image enhancement technology in which the narrow bandwidth of light is strongly absorbed by Hb and penetrates only the surface of tissue, increasing the visibility of hypervascular cancer tissue, in contrast to normal urothelium. • Improved cancer detection has been demonstrated by NBI flexible cystoscope and NBI-guided biopsies and resection.
  • 55. Additional technologies 1.Confocal laser micro-endoscopy high resolution imaging probe designed to provide endoscopic histological grading in real time but requires further validation .
  • 56. Additional technologies 2. Storz professional image enhancement system (IMAGE1 S, formally called SPIES) is an image enhancement system using four different light spectra but prospective data using this system are lacking .
  • 58. Epidemiology • Approximately 70% of bladder tumors are NMIBC at presentation Campbell- Walsh Urology 12th edition ; Aldousari and Kassouf, 2010; Ta: 70% T1: 20% CIS: 10%
  • 59.
  • 60. TURBT: transurethral resection of bladder tumor • First-line to diagnose, stage, and treat visible tumors. • Goal: to make the correct diagnosis and completely remove all visible lesions. • EUA done before & after TURBT to asses disease extent & residual tumor. • Muscle must be seen in TURBT specimen before ruling out invasive disease • Biopsies of apparently uninvolved urothelium should be obtained to rule out occult Tis. • Biopsy from the prostatic urethra is necessary in some cases
  • 61. Steps to achieve a successful TURBT Identifying the factors required to assign • disease risk (number of tumurs, size, multifocality, characteristics, concern for the presence of CIS, recurrent vs. primary tumour), • clinical stage (bimanual examination under anaesthesia, assignment of clinical tumour stage), • adequacy of the resection (visually complete resection, visualisation of muscle at the resection base), and • presence of complications (assessment for perforation)
  • 62. Surgical strategy of resection • Piecemeal resection in fractions (separate resection of the exophytic part of the tumour, the underlying bladder wall and the edges of the resection area) 1 • En-bloc resection using monopolar or bipolar current, Thulium-YAG or Holmium-YAG laser. It provides high quality resected specimens with the presence of detrusor muscle in 96-100% of cases 2 1. Richterstetter, M., et al. The value of extended transurethral resection of bladder tumour (TURBT) in the treatment of bladder cancer. BJU Int, 2012. 110: E76. 2. Kramer, M.W., et al. Current Evidence of Transurethral En-bloc Resection of Nonmuscle Invasive Bladder Cancer. Eur Urol Focus, 2017. 3: 567.
  • 63. Pathologist should comment on: • Size • tumour grade • depth of tumour invasion, • presence of CIS • whether the detrusor muscle is present in the specimen. • specify the presence of LVI or unusual (variant) histology • If there is uncertainty over the pathology, a further early re- resection (2-6 wk.) is indicated.
  • 64. Prostatic urethral biopsies • Patients with T1G3 Bladder Cancer, the incidence of CIS in the prostatic urethra was 11.7% 1 • Take the biopsy from abnormal areas in the prostatic urethra and from the precollicular area (between the 5 and 7 o’clock position) using a resection loop 1, 2 1. Palou, J., et al. Female gender and carcinoma in situ in the prostatic urethra are prognostic factors for recurrence, progression, and disease-specific mortality in T1G3 bladder cancer patients treated with bacillus Calmette-Guerin. Eur Urol, 2012. 62: 118. 2. Mungan, M.U., et al. Risk factors for mucosal prostatic urethral involvement in superficial transitional cell carcinoma of the bladder. Eur Urol, 2005. 48: 760
  • 65. Take a biopsy of the prostatic urethra in cases • bladder neck tumour, • if bladder carcinoma in situ is present or suspected, • if there is positive cytology without evidence of tumour in the bladder, • if abnormalities of the prostatic urethra are visible. • If biopsy is not performed during the initial procedure, it should be completed at the time of the second resection. Brant, A., et al. Prognostic implications of prostatic urethral involvement in non-muscle-invasive bladder cancer. World J Urol, 2019. 37: 2683.
  • 66. Second look TURBT? Indications • Residual disease after initial TURBT • When specimen contained no muscle • High-grade and/or T1 tumor • Timing and strategy: • Most recommend 2-6 weeks after initial TUR • Should include resection of primary tumor site Cumberbatch, M.G.K., et al. Repeat Transurethral Resection in Non-muscle-invasive Bladder Cancer: A Systematic Review. Eur Urol, 2018
  • 67.
  • 68.
  • 69.
  • 70. PREDICTING DISEASE RECURRENCE AND PROGRESSION • EORTC Genito-Urinary Cancer Group has developed a scoring system and risk tables • The basis for the scoring system are individual patient data from 2,596 patients diagnosed with TaT1 tumours, who were randomised into seven EORTC trials • Patients with CIS alone, undergo a second TURB or receive maintenance BCG were not included. Sylvester RJ, et al: Predicting recurrence and progression in individual patients with stage Ta T1 bladder cancer using EORTC risk tables. Eur Urol.2006;
  • 71.
  • 72.
  • 73.
  • 74.
  • 75.
  • 76. INTRAVESICAL THERAPY Perioperative Intravesical Therapy • Single-dose intravesical chemotherapy administered within 6 hours of resection reduces recurrence of low-risk tumors 1, 2 • Mitomycin C (MMC) appears to be the most effective adjuvant intravesical chemotherapeutic agent perioperatively, epirubicin is used in Europe 1, 3 • Average recurrence rate was 54% in the TUR-alone group versus 38% in the TUR-plus-MMC group 4 1. Bosscheiter et al., 2018, 2. uque and Loughlin, 2000; Isaka et al., 1992; Oosterlinck et al., 1993; Sekine et al., 1994; Solsona et al., 1999 3. Witjes and Hendricksen, 2008 4. Nilsson S, et al . A systematic overview of chemotherapy effects in urothelial bladder cancer. Acta Oncol. 2001
  • 77. Sylvester et al., 2004: THE JOURNAL OF UROLOGY® 2004 ; A single immediate postoperative instillation of chemotherapy decreases the risk of recurrence in patients with stage ta t1 bladder cancer: a meta-analysis of published results of randomized clinical trials
  • 78.
  • 79. Mitomycin C • MMC is an alkylating agent that inhibits DNA synthesis. • The drug is usually instilled weekly for 6 to 8 weeks at dose ranges from 20 to 60 mg. • used for Low grade, Ta or T1 tumours, and recurrent multifocal TCC • single-​dose Intravesical therapy is equivalent to that seen using weekly instillations for 6wk, post-​TURBT Sylvester RJ, et al. (2004). A single immediate postoperative instillation of chemotherapy decreases the risk of recurrence in patients with stage TaT1 bladder cancer: a meta-​analysis. J Urol
  • 80. • most studies shows MMC a viable option for reduction in recurrence (but not for progression) in light of its lesser side effects 1 • Adverse effect of MMC include Skin rash- palmar desquamation, Irritative symptoms and chemical cystitis (10%) and rarely, contracted bladder Huncharek et al., 2001, Anticancer research Journal ; Impact of intravesical chemotherapy on recurrence rate of recurrent superficial transitional cell carcinoma of the bladder: results of a meta-analysis
  • 81. Intravesical Immunotherapy: Bacille Calmette-Guérin • Over 30 years’ successful application of Bacillus Calmette Guerin (BCG) to the clinical treatment of bladder cancer has proved it one of the most promising immunotherapies for cancer 1 • Intravesical BCG results in a robust local immune response 2 • directly reacts to the tumor cells, causing apoptosis, necrocytosis, oxidative stress, 1 1. Jiansong Han et al, 2020 ; Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect 2. Shen et al., 2008
  • 82. Mechanism of action • Initial step is direct binding to fibronectin within the bladder wall leading to direct stimulation of cell-based immunologic response 1 • Numerous cytokines involved in the initiation or maintenance of inflammatory processes including TNF-α, GM-CSF, IFN-γ, and IL-1, IL-2, IL-5, IL-6, IL-8, IL-10, IL-12, and IL-18 have been detected in the urine of patients treated with intravesical BCG.1 • cytokine induction with preferential upregulation of IFN-γ, IL-2, and IL-12 reflects induction of a T-helper type-1 (Th1) response 2 • This immunologic response activates cell-mediated cytotoxic mechanisms believed to underlie the efficacy of BCG and other agents in the prevention of recurrence and progression 2 1. Ludwig et al., 2004 2. Bohle and Brandau, 2003
  • 83. Jiansong Han et al, 2020 ; Biomedicine & Pharmacotherapy Journal Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect The model of mechanisms of BCG in bladder cancer. When BCG is exposed to tumor microenviroment, it attaches to the cell surface and be internalized by tumor cells to active different pathways such as NF-KB. Cytokines will be released by some immune cells like nuetrophils and macrophages to attend immune cascade or kill the tumor cells directly
  • 84. • BCG powdered vaccine 80mg is reconstituted with 50 mL of saline • typically started 2 to 4 weeks after resection, allowing time for re- epithelialization of the bladder after TURBT, thereby minimizing the potential for intravasation of live bacteria • A urinalysis is usually performed immediately before instillation • After instillation, the patient should retain the solution for at least 1 to 2 hours • Fluid, diuretic, and caffeine restriction before instillation limits dilution of the agent by urine and facilitates adequate retention of the agent for 2 hours 1. Lamm et al. 2011 2. Herr, 2012 3. Lamm et al., 2000b
  • 85. BCG Prophylaxis to Prevent Recurrence and Progression Conclusion: • In NMIBC several intravesical therapies are associated with a decreased risk of recurrence and Progression vs transurethral bladder tumor resection alone
  • 86. Conclusion In 403 patients with CIS, BCG reduced the risk of progression by 35% compared with intravesical chemotherapy.
  • 87.
  • 89.
  • 90. Bacille Calmette-Guérin: Treatment Schedule • Several studies and AUA guidelines suggest that a 6-week induction course • Durations of maintenance therapy based on risk stratification of the tumor 2 • Southwest Oncology Group (SWOG) reported the most significant impact of maintenance therapy. Patients received a 6-week induction course followed by 3 weekly instillations at 3 and 6 months and every 6 months thereafter for 3 years.1 • intermediate-risk disease, a 1-year course of maintenance BCG was administered at months 3, 6, and 12 and In patients with high-risk disease, the instillations were continued every 6 months thereafter up to 3 years. 2 1. Chang et al., 2016 2. Oddens et al. 2013
  • 91. Bohle and Bock,et al 2004, Intravesical bacille Calmette-Guérin versus mitomycin C in superficial bladder cancer: formal meta-analysis of comparative studies on tumor progression
  • 92.
  • 93.
  • 94.
  • 95.
  • 96.
  • 97. O’Donnell et al: Practical applications of intravesical chemotherapy and immunotherapy in high-risk patients with superficial bladder cancer. Urol Clin North Am 32:121–131, 2005
  • 98. Role of “Early” Cystectomy • Despite local therapy, many cases of high-grade NMIBC will progress to invasion 1 • Patients of CIS in whom BCG unresponsiveness will have a 50% chance of disease progression and potential for disease-specific mortality. 1 • Early (3-month) failure for T1 tumors after BCG is associated with an 82% progression rate. 2 • Ten-year survival after cystectomy for non–muscle-invasive cancer can range from 67% to 92%. 3 1. Catalona et al., 1987 2. Herr et al., 2000a 3. Lee et al., 2007; Schrier et al., 2004
  • 99. Cystectomy / Radical cystectomy consider in NMIBC • high grade tumour • invading deeply into lamina propria, • lymphovascular invasion, • diffuse CIS, • Tumour in diverticula, • Tumour involve the distal ureters or prostatic urethra, • Refractory to initial therapy, • Tumour too large or anatomically inaccessible to be removed in their entirety endoscopically.
  • 100. Follow up • TaT1 tumurs and carcinoma in situ (CIS) on regular cystoscopy. • Patients with low-risk Ta tumours should undergo cystoscopy at three months. If negative, subsequent cystoscopy is advised nine months later, and then yearly for five years. 1 • Patients with high-risk tumours should undergo cystoscopy and urinary cytology at three months. If negative, subsequent cystoscopy and cytology should be repeated every three months for a period of two years, and every six months thereafter until five years, and then yearly. 2 Palou, J., et al. 2009 Soukup, V., et al. 2012 Holmang, S., et al. 2012
  • 101. • Patients with intermediate-risk Ta tumours should have an in-between (individualised) follow-up scheme using cystoscopy. 1, 2 • Regular (yearly) upper tract imaging (computed tomography-intravenous urography [CT-IVU] ) is recommended for high-risk tumours. 1 • Cystoscopy under anaesthesia and bladder biopsies should be performed when office cystoscopy shows suspicious findings or if urinary cytology is positive 3 1. Holmang, S., et al. 2012 2. Soukup, V., et al. 2012 3. Niwa, N., et al. 2015
  • 102. • During follow-up in patients with positive cytology and no visible tumour in the bladder, mapping-biopsies or PDD-guided biopsies and investigation of extravesical locations (CT urography, prostatic urethra biopsy) are recommended. • In patients initially diagnosed with TaLG bladder cancer, use ultrasound of the bladder during surveillance in case cystoscopy is not possible or refused by the patient.
  • 103. INDEX PATIENT NO. 1: • ABNORMAL UROTHELIAL GROWTH BUT NOT PROVEN CANCER • Standard: Obtain biopsy to confirm grade for all index patients. • If possible, eradicate all visible tumors. • If cancer, periodic cystoscopy. • Option: Single dose of postoperative intravesical chemotherapy
  • 104. INDEX PATIENT NO. 2: • SMALL-VOLUME, LOW-GRADE Ta • Recommendation: Single dose of postoperative intravesical chemotherapy.
  • 105. INDEX PATIENT NO. 3: • MULTIFOCAL OR LARGE LOW-GRADE Ta, OR RECURRENT LOW-GRADE Ta • Recommendation: Intravesical BCG or MMC—goal to prevent/ delay recurrence. • Option: Maintenance BCG or MMC.
  • 106. INDEX PATIENT NO. 4: • HIGH-GRADE Ta, T1, OR CIS • Standard: If T1 disease, but no muscularis in specimen, repeat resection. • Recommendation: Intravesical BCG with maintenance therapy. • Option: Consider cystectomy for select patients.
  • 107. INDEX PATIENT NO. 5: • HIGH-GRADE Ta, T1, AND/OR CIS AFTER PRIOR INTRAVESICAL THERAPY • Standard: T1 disease but no muscularis in specimen, repeat resection. • Recommendation: Consider cystectomy as therapeutic alternative. • Option: Further intravesical therapy may be considered.
  • 108. Bladder biopsies • biopsies from suspicious urothelium should be taken • Patients with positive urine cytology, or with a history of HG NMIBC and in tumors with non- papillary appearance, mapping biopsies from normal-looking mucosa is recommended 1 • biopsies should be taken from the trigone, bladder dome, right, left, anterior and posterior bladder wall 1,2 1. Hara, T., et al. Risk of concomitant carcinoma in situ determining biopsy candidates among primary non-muscle-invasive bladder cancer patients: retrospective analysis . Int J Urol, 2009. 2. van der Meijden, A., et al. Significance of bladder biopsies in Ta,T1 bladder tumors: a report from the EORTC Genito-Urinary Tract Cancer Cooperative Group. EORTC-GU Group Superficial Bladder Committee. Eur Urol, 1999.
  • 110. Introduction • Over 30 years’ successful application of Bacillus Calmette Guerin (BCG) to the clinical treatment of bladder cancer has proved it one of the most promising immunotherapies for cancer 1 • Intravesical BCG results in a robust local immune response 2 • directly reacts to the tumor cells, causing apoptosis, necrocytosis, oxidative stress, 1 1. Jiansong Han et al, 2020 ; Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect 2. Shen et al., 2008
  • 111. • Intravesical BCG is a live, attenuated mycobacteria and therefore has the potential risk for transmission. • Urine Routine and culture should be done before installation • The preparation, handling and disposal should bring with it the same precautions of other biohazardous materials. • BCG powdered vaccine 80mg is reconstituted with 50 mL of saline • Fluid, diuretic, and caffeine restriction before instillation limits dilution of the agent by urine and facilitates adequate retention of the agent for 2 hours 1. Lamm et al. 2011 2. Herr, 2012 3. Lamm et al., 2000b
  • 112. Administration procedure: 1. Assemble equipment on trolley as above. 2. Reconstitute BCG using closed system equipment as per manufacturers’ instructions. BCG should always be given within 2 hours of mixing. 3. Place both plastic and linen draw sheet underneath patient’s buttocks. 4. Insert urethral catheter as per policy and drain bladder 5. A plastic backed sheet should be placed under the catheter connection and across the patient to prevent the spillage of BCG onto the patient or bedding if there is a leak.
  • 113. 6. Instil BCG into patient’s bladder in adherence to the manufacturer’s instructions for using closed system products. 7. Remove catheter carefully and advise the patient they are to retain liquid in bladder for up to two hours following instillation. 8. All efforts should be made to ensure the intravesical drugs do not come into contact with the skin, clothing or other surfaces.
  • 114. 9. Following insertion of intravesical therapeutic agents, the patient should lie prone, supine left lateral and right lateral for 15 minutes each. The drug needs to remain in the patient’s bladder for at least 1 hour (to a maximum of 2 hours). 10. equipment, in contact with cytotoxic material, should be disposed of into 2 cytotoxic waste bags, labelled and secured closed with cytotoxic tape and disposed of in the clinical waste for incineration. 11. Following completion of the treatment, the patient should be advised to void into the designated toilet. 12. The toilet should not be flushed. Two cups of bleach should be poured into the toilet bowl and left for 20 minutes prior to flushing. Patients should be advised to continue to use bleach in the toilet bowl with each void for 6 hours following treatment.
  • 115. 13.The patient should be encouraged to drink 2-3 litres of fluid for the first 24 hours following treatment to encourage elimination of absorbed drugs. 14.Urine samples should not routinely be sent to the laboratory within 72 hours of treatment. 15.The patient should be given instructions on after care, their next appointment and contact details should they encounter any problems prior to leaving the department.
  • 116. Mechanism of action • Initial step is direct binding to fibronectin within the bladder wall leading to direct stimulation of cell-based immunologic response 1 • Numerous cytokines involved in the initiation or maintenance of inflammatory processes including TNF-α, GM-CSF, IFN-γ, and IL-1, IL-2, IL-5, IL-6, IL-8, IL-10, IL-12, and IL-18 have been detected in the urine of patients treated with intravesical BCG.1 • cytokine induction with preferential upregulation of IFN-γ, IL-2, and IL-12 reflects induction of a T-helper type-1 (Th1) response 2 • This immunologic response activates cell-mediated cytotoxic mechanisms believed to underlie the efficacy of BCG and other agents in the prevention of recurrence and progression 2 1. Ludwig et al., 2004 2. Bohle and Brandau, 2003
  • 117. Jiansong Han et al, 2020 ; Biomedicine & Pharmacotherapy Journal Mechanisms of BCG in the treatment of bladder cancer-current understanding and the prospect The model of mechanisms of BCG in bladder cancer. When BCG is exposed to tumor microenviroment, it attaches to the cell surface and be internalized by tumor cells to active different pathways such as NF-KB. Cytokines will be released by some immune cells like nuetrophils and macrophages to attend immune cascade or kill the tumor cells directly
  • 118. BCG Prophylaxis to Prevent Recurrence and Progression Conclusion: • In NMIBC several intravesical therapies are associated with a decreased risk of recurrence and Progression vs transurethral bladder tumor resection alone
  • 119. Conclusion In 403 patients with CIS, BCG reduced the risk of progression by 35% compared with intravesical chemotherapy.
  • 120.
  • 122. Symptoms of cystitis and LUTS • frequency, dysuria and occasional mild haematuria. These symptoms usually subside within 24 to 48 hours • Phenazopyridine, or non-steroidal anti-inflammatory drugs (NSAIDs). • If symptoms improve within a few days: continue instillations. • If symptoms persist or worsen: • Postpone the instillation • Perform a urine culture • Start empirical antibiotic treatment
  • 123. If symptoms persist even with antibiotic treatment: • With positive culture: adjust antibiotic treatment according to sensitivity • With negative culture: quinolones and potentially analgesic anti-inflammatory instillations once daily for 5 days (repeat cycle if necessary) . • If symptoms persist: anti-tuberculosis drugs + corticosteroids. • If no response to treatment and/or contracted bladder: radical cystectomy.
  • 124. Haematuria • Perform urine culture to exclude haemorrhagic cystitis, if other symptoms present. • If haematuria persists, perform cystoscopy to evaluate presence of bladder tumour
  • 125. Symptomatic granulomatous prostatitis • Symptoms rarely present: perform urine culture. • Quinolones is treatment of choice • If quinolones are not effective: isoniazid (300 mg/day) and rifampicin (600 mg/day) for three months. • Cessation of intravesical therapy.
  • 126. Epididymo-orchitis • Perform urine culture and administer quinolones. • Cessation of intravesical therapy. • Orchidectomy if abscess or no response to treatment.
  • 127. Arthritis • Rare complication and considered autoimmune reaction. • Arthralgia and arthritis : treatment with NSAIDs. • If no/partial response, proceed to corticosteroids, high-dose quinolones or antituberculosis drugs.
  • 128. Persistent high-grade fever • (> 38.5°C for > 48 h) • Permanent discontinuation of BCG instillations. • Immediate evaluation: urine culture, blood tests, chest X-ray. • Prompt treatment with more than two antimicrobial agents while diagnostic evaluation is conducted. • Consultation with an infectious diseases specialist.
  • 129. BCG sepsis • Evaluation: total count, urine culture, chest X-ray, ESR, CRP • Cessation of BCG. • For severe infection: • High-dose quinolones or isoniazid, rifampicin and ethambutol • Start ATT for 6 months • Early, high-dose corticosteroids as long as symptoms persist. • Consider an empirical non-specific antibiotic to cover Gram-negative bacteria and/or Enterococcus.
  • 130. Allergic reactions • Antihistamines and anti-inflammatory agents. • Consider high-dose quinolones or isoniazid and rifampicin for persistent symptoms. • Delay therapy until reactions resolve
  • 131. Bacille Calmette-Guérin: Treatment Schedule • Several studies and AUA guidelines suggest that a 6-week induction course 1 • Durations of maintenance therapy based on risk stratification of the tumor 2 • Southwest Oncology Group (SWOG) reported the most significant impact of maintenance therapy. Patients received a 6-week induction course followed by 3 weekly instillations at 3 and 6 months and every 6 months thereafter for 3 years.1 • intermediate-risk disease, a 1-year course of maintenance BCG was administered at months 3, 6, and 12. 2 1. Chang et al., 2016 2. Oddens et al. 2013
  • 132.
  • 133.
  • 134. BCG-refractory tumour • If T1G3/HG tumour is present at 3 months . Further conservative treatment with BCG is associated with an increased risk of progression • If TaG3/HG tumour is present after 3 months and/or at 6 months, after either re-induction or first course of maintenance. • If CIS (without concomitant papillary tumour) is present at 3 months and persists at 6 months after either re-induction or first course of maintenance. If patients with CIS present at 3 months, an additional BCG course can achieve a complete response in > 50% of cases • If HG tumour appears during BCG maintenance therapy
  • 135. BCG-relapsing tumour • Recurrence of G3/HG tumour after completion of BCG maintenance, despite an initial response • Radical cystectomy or repeat BCG course according to individual situation. • Bladder-preserving strategies
  • 136. BCG unresponsive tumour • BCG refractory or T1Ta/HG BCG recurrence within 6 months of completion of adequate BCG exposure • or • Development of CIS within 12 months of completion of adequate BCG exposure • Radical cystectomy or bladder preservation strategy
  • 137.
  • 140. Overview • 20% to 30% of patients will present with muscle-invasive bladder cancer at the time of initial presentation. • 20% will progress to muscle-invasive disease after an initial diagnosis of non–muscle-invasive bladder cancer. • 30% of patients diagnosed with MIBC have undetected metastasis at the time of treatment of primary tumor. • 25% of patients submitted to radical cystectomy present with lymph node involvement at the time of surgery.
  • 141. IMAGING IN MIBC • optimal to obtain cross-sectional imaging before TUR. • if imaging is obtained subsequently, it should be delayed approximately 7 days post-procedure to minimize inflammatory artifact, which can be mistaken for T3 disease (Kim et al, 2004). • Both CT & MRI cannot accurately diagnose microscopic invasion of perivesical fat (T2 vs T3a). • aim of CT or MRI is therefore to detect T3b disease or higher. • pelvis nodes > 8mm and abdominal nodes >10mm in maximum short-axis diameter is regarded as enlarged on CT or MRI.
  • 142.
  • 143. ROLE OF PET IN DISTANT METS • Evidence is accruing in the literature suggesting that 18F- fluorodeoxyglucose (FDG)-positron emission tomography (PET)/CT might have potential clinical use for staging metastatic BC but there is no consensus yet. • The results of further trials are awaited before a recommendation can be made.
  • 144. Magnetic resonance imaging is more sensitive and specific for diagnosing bone metastases than bone scintigraphy. • Conclusion: Whole-body MR imaging for the evaluation of metastases compared well with the reference techniques for cerebral, pulmonary, and hepatic lesions. Whole-body MR imaging was more sensitive in the detection of hepatic and osseous metastases than were the reference techniques.
  • 145. NEOADJUVANT CHEMOTHERAPY FOR MUSCLE- INVASIVE BLADDER CANCER • Advantages 1. chemotherapy is often better tolerated before surgery-delay in chemotherapy after surgery due to complications or debilitation. 2. Patients with micrometastatic disease. 3. downstage bulky and locally advanced tumors increasing likelihood for negative surgical margins. 4. allows the clinician to assess each individual’s response to therapy.
  • 146. NAC Disadvantage: - chemotherapy is a delay in definitive local therapy for patients who do not respond to chemotherapy and thus experience disease progression.
  • 147. NEOADJUVANT CHEMOTHERAPY FOR MUSCLE-INVASIVE BLADDER CANCER • 50% of patients with muscle-invasive bladder cancer treated with cystectomy alone will progress to metastatic disease (Stein et al, 2001; Ghoneim et al, 2008). •
  • 148. Is NAC really beneficial for T2 or less??? • 526 patients in 3 arms - No NAC - partial NAC - complete NAC
  • 149. • • Cisplatin-based neoadjuvant chemotherapy is associated with an overall survival advantage of 5% to 6% and a pathologic complete response rate of 30% to 40%.
  • 150. RADICAL CYSTECTOMY AND PELVIC LYMPH NODE DISSECTION • Patients with clinical T2-T4a, N0, M0 disease, remains the gold standard therapy. • Time from diagnosis MIBC to cystectomy likely impacts oncologic outcomes, particularly if there is a delay of greater than 12 weeks Sanchez-Ortiz and colleagues (2003)
  • 151. Radical cystectomy in NMIBC 1. are high grade and invading deeply into lamina propria 2. exhibit lymphovascular invasion 3. associated with diffuse CIS 4. diverticula 5. substantially involve the distal ureters or prostatic urethra 6. refractory to initial therapy 7. too large or anatomically inaccessible to be removed entirety endoscopically.
  • 152. Radical cystectomy indications in MIBC and others • MUSCLE INVASIVE • T2-T4a.N0, N0, M0 disease • OTHERS • Non urothelial carcinomas (squamous, adeno) • non responders to conservative therapy • Recurrences after bladder sparing treatments • Palliative intervension- fistula formation,pain,recurrent visible haematuria
  • 153. CONTRAINDICATIONS- CYSTECTOMY 1. Unresectable - lymph node metastases. 2. Bulky lymph node with extensive periurethral disease. 3. Bladder is fixed to the pelvic sidewall, or invading the recto sigmoid colon.
  • 154. RADICAL CYSTECTOMY • Technique-removal of bladder and adjacent organs • Male- removal of prostate, seminal vesicles • Female- removal of uterus,cervix,vagina and ovary
  • 155. URETHRECTOMY INDICATIONS • Positive margin at the level of urethral dissection. • Primary tumor is located at bladder neck or in urethra. • Extensive infiltration of prostate.
  • 156. Consent • Pt is explained about his/her disease and the diagnosis MIBC • The need for surgery • The prognosis (5 yr survival 50-60%) • Organ removed – bladder, - prostate, seminal vesicles • Pt is explained about ileal conduit & complication & stoma care • VAS deferens ligation • Erectile dysfn • Gen complications: infection,bleeding,trauma and others
  • 157. Pre Op Prep 1. Blood reservation 2. Only liquid diet from morning on the day before surgery 3. Oval peglec at 12 to noon 4. NBM 12:00 midnight 5. Ileostomy site marking 6. Inform pathology dept for frozen section preparation 7. Part preparation nipple to knee. On the day of sx Morning - serum electrolytes, pulse /BP/RBS - Antibiotics -cephalosporin +Metronidazole
  • 158. Pre Op Prep 1. Blood reservation 2. Only liquid diet from morning on the day before surgery 3. Oral peglec at 12 to noon 4. Nil By Mouth,12:00 midnight 5. Ileostomy site marking 6. Inform pathology dept for frozen section preparation 7. Part preparation nipple to knee. - On the day of surgery serum electrolytes, RBS - Antibiotics - Cephalosporin +Metronidazole
  • 159. MAIN STEPS • POSITION • INCISION • ABDOMINAL EXPLORATION • BOWEL MOBILIZATION • URETERAL DISSECTION • PELVIC LYMPHADENECTOMY • LIGATION OF LATERAL VASCULAR PEDICLE • LIGATION OF POSTERIOR VASCULAR PEDICLE • ANTERIOR ,APICAL DISSECTION
  • 160. Position • Hyper extended supine position with iliac crest located below the fulcrum of operating table • The legs are slightly abducted
  • 161. Incision • Vertical midline incision • Incision should be carried lateral to umbilicus on the contralateral side of stoma site • While opening of posterior rectus sheath ,care should be taken to remove the urachus en bloc with bladder
  • 162. Abdominal Exploration • Look for extent and resectability • Hepatic metastasis • Gross regional and retroperitoneal lymphadenopathy
  • 163. Ureteral resection • Ureters are dissected in to deep pelvis(several cm beyond the iliac vessels) and divided between two large hemo clips • Proximal cut end of ureteral segment is send for frozen section • Leaving the proximal hemo clip on divided ureter allows for hydro static ureteral dilation and facilitates uretero enteric anastomoses
  • 164. Pelvic Dissection Blood supply of bladder • lateral pedicle - Superior vesicle artery - Inferior vesicle artery • Posterior pedicle • Superior & inferior vesicle arteries are branch of anterior division of Int iliac Artery. • Posterior pedicle is branch of posterior division of Internal iliac Artery.
  • 165.
  • 166. Control DVC vicryl 1-0 or 1 number and apply “figure of eight suture” on DVC complex and fix it to pubic symphysis
  • 167. Anatomic Extent of Pelvic Lymph Node Dissection and Landing Zones
  • 169. Extended LN dissection • Completed extended pelvic lymph node dissection
  • 170. • 5-year recurrence-free survival of patients with lymph node positive disease was - 7% for limited - 35% for extended node dissection • It is recommend that an adequate pelvic lymph node dissection at a minimum includes all lymphatic tissue around the common iliac, intercommon iliac, internal iliac, and obturator packets bilaterally. • It has also been suggested that frozen-section analysis be performed for the lymph nodes in the true pelvis, and if metastasis is not identified, a more superior dissection can be omitted.
  • 171.
  • 172. Number of Lymph Nodes Removed at the Time of Cystectomy • -50% if 15-25 nodes • -75% if 25 nodes • - 90% if 45 nodes • (suggesting 25 node minimum).
  • 173. Lymph Node Density and Extracapsular Nodal Extension • Lymph node density refers to the percentage of positive nodes relative to the total number of nodes removed. • Herr (2003) and colleagues) In their study of 162 patients with lymph node positive bladder cancer patients who had a lymph node density of less than 20%, these patients experienced a significantly better 5-year disease- specific survival following radical cystectomy. • Seiler and colleagues (2011) reported an extranodal extension to be an independent predictor of overall survival and disease-specific survival in a smaller cohort (n=162) of lymph node positive patients.
  • 174. Intraoperative Decision Making A. Grossly Positive Nodes and T4b Disease -Cystectomy is not performed 1. when lymph node metastases are unresectable because of bulk, 2. when there is evidence of extensive periureteral disease, 3. when the bladder is fixed to the pelvic sidewall 4. when the tumor is invading the rectosigmoid colon
  • 175. Intraoperative Decision Making B.Intraoperative Frozen Sections of the Ureter • The incidence of involvement of the distal ureter with tumor on final pathology at the time of radical cystectomy was 6% to 8% (Gakis et al, 2011). • Final ureteral margin status has proven to be an independent predictor of upper tract recurrence following cystectomy (Tran et al, 2008; Volkmer et al, 2009). • role of intraoperative frozen-section analysis of the ureters at the time of cystectomy remains somewhat controversial.
  • 176.
  • 177. Urinary diversion after radical cystectomy Orthotopic Orthotopic bladder substitution Heterotopic • Continent Right colonic pouches-Indiana,Florida,Miami,Penn Ileal pouches- Kock,Mainz Caecum & ascending colon-Mainz I • Non continent Ileal/colonic conduit Cutaneous ureterostomy • Diversion in to GIT Uretrosigmoidostomy/Rectal bladder-Manz II,Mansuora rectal bladder
  • 178. Ileal conduit urinary diversion Originally described by Zaayer in 1911, popularised by Bricker in early 1950s Reliable, easily performed procedure which has stood test of time Typically 10-15 cm of ileum, 10-15cm from ileocaecal valve Contraindications: Short bowel syndrome Inflammatory bowel disease Pelvic irradiation
  • 179. Oncologic Outcomes following Radical Cystectomy . • Lymph node status appears to be the single greatest predictor of disease outcome.
  • 180. ADJUVANT CHEMOTHERAPY FOR MUSCLE-INVASIVE BLADDER CANCER • Patients with pT3-T4 or node-positive disease are known to be at high risk for failure following cystectomy. • A major limitation of adjuvant chemotherapy is that it is often difficult or impossible for patients to undergo systemic therapy following cystectomy secondary to surgical deconditioning, deteriorating renal function, or perioperative complications (Donat et al, 2009).
  • 181. Randomised trails of adjuvant chemo • The EUA guidelines currently recommend adjuvant chemotherapy within clinical trials but not as a routine therapeutic option
  • 182. Partial cystectomy • First, a full pelvic lymphadenectomy can be performed that allows for complete staging. Second, the full thickness of bladder wall and associated perivesical fat can be removed. • Ideal candidates for partial cystectomy include those with small, solitary tumors amenable to wide resection with 2-cm margins. Ideally the tumor should be away from the ureteral orfices to avoid reimplantation. • complete resection while maintaining adequate functional bladder capacity • The presence of CIS is considered by most to be a contraindication to partial cystectomy, and random bladder biopsies can be performed preoperatively. • The MSKCC group has also recommended the routine use of intraoperative frozen sections and proceeding with radical cystectomy if a negative margin cannot be achieved (Holzbeierlein et al, 2004).
  • 183. Multimodality bladder-preserving treatment • trimodality treatment combines TURB, chemotherapy and RT • The aim of MMT is to preserve the bladder and QoL without compromising oncological outcome. • Patients who are medically unfit for surgery or who refuse surgery can be considered for bladder preservation.
  • 185.
  • 186. Time schedule for surveillance • EAU Guidelines - CT scan (every 6 months) until the third year, followed by annual imaging thereafter. - CT scan of the UUT(Patients with multifocal disease, NMIBC with CIS or positive ureteral margins are at higher risk of developing UTUC, which can develop late (> 3 years)).
  • 187. Follow-up of functional outcomes and complications • The functional complications are diverse : vitamin B12 deficiency metabolic acidosis worsening of renal function urinary infections urolithiasis stenosis of uretero-intestinal anastomosis stoma complications in patients with ileal conduit neobladder continence problems emptying dysfunction risk of fractures

Editor's Notes

  1. When diagnosed according to strictly defined criteria (e.g., lack of cytologic atypia), inverted papillomas behave in a benign fashion
  2. chronic irritation (including trauma, previous surgery, renal transplantation, intravesical chemotherapy, stones, catheters, and infection )
  3. few case reports of cystitis cystica or glandularis transforming into adenocarcinoma, and therefore regular endoscopic evaluation
  4. occur most commonly in women of childbearing age and are histologically similar to leiomyomas of the uterus (Goel and Thupili, 2013).
  5. Males are 3 to 4 times more likely to develop bladder cancer than females, presumably because of an increased prevalence of smoking and exposure to environmental toxins.
  6. Egypt has the highest rate of squamous cell carcinoma because of the endemic infections with Schistosoma
  7. N-acetyltransferase (NAT) detoxifies nitrosamines, a known bladder carcinogen. Specifically, NAT-2 regulates the rate of acetylation of compounds such as caffeine, which are related to bladder cancer formation These polymorphisms are present in 27% of white, 15% of African-American, and 3% of Asian males, thus partially explaining the different bladder cancer incidence rates across ethnic groups. Null GSTM1 and slow NAT-2 lead to high levels of 3-aminobiphenyl and higher risk of bladder cancer
  8. It concludes that identifying families with statistically significant risks for nonsmoking related urothelial cancer would be extremely informative for genetic linkage study.
  9. Smoking contains aromatic amines and polycyclic aromatic hydrocarbons, renally excreted. smoking cessation does make a difference in urothelial cancer formation. Those who have stopped for more than 15 years have a 1.1 relative risk of bladder cancer formation
  10. higher in coffee and tea drinkers, but this may be confounded by smoking or other dietary factors associated with people who drink coffee or tea Mediterranean diet leads to the lowest urothelial cancer risk
  11. A meta-analysis supports a possible association between HPV infection and bladder cancer, reporting a 2.3 relative risk with confidence intervals (CIs) of 1.3 to 4.1 (Gutierrez et al, 2006). Life cycle of schistosomiasis??????????????
  12. The risk is linearly related to the duration and intensity of cyclophosphamide treatment.
  13. In developed industrial settings, risks have been reduced by work-safety guidelines; therefore, chemical workers no longer have a higher incidence of BC compared to the general population.
  14. Pneumaturia due to malignant colovesical fistula, though less common than benign causes (diverticular and Crohn’s disease).
  15. ……
  16. If ct is contraindicated
  17. Examination of voided urine or bladder-washing specimens for exfoliated cancer cells.
  18. A standardised reporting system redefining urinary cytology diagnostic categories was published in 2016 by the Paris Working Group [85]: ……..collection: , it should not be earlymorning void because it contains degenerated cells, examined within 4 hours of collection.
  19. There are various urine markers that can be used to evaluate secreted proteins or shed cells in the hope of noninvasively detecting bladder cancer. To date, none of these markers has a high enough sensitivity or specificity to replace office cystoscopy. bladder tumour antigen (BTA) or nuclear matrix protein 22 (NMP22
  20. a meticulous investigation of the bladder and the prostatic urethra with multiple biopsies is mandatory. The upper urinary tract should also be evaluated by CT (specificity of 93–100%). In case of a doubtful CT result, ureteroscopy and selective cytology with biopsies of the suspicious areas should be performed. - cystoscopy with PDD is recommended
  21. Bladder growth(site, size, number, sessile vs pedunculated, remaining normal bladder mucosa)
  22. obtain representative mapping of the bladder mucosa, biopsies should be taken from the trigone, bladder dome, right, left, anterior and posterior bladder wall
  23. Tumor invades any of the following: prostatic stroma, seminal vesicles, uterus, vagina, pelvic wall,abdominal wall T4a Tumor invades prostatic stroma, uterus, vagina T4b Tumor invades pelvic wall, abdominal wall
  24. NX Lymph nodes cannot be assessed N0 No lymph node metastasis N1 Single regional lymph node metastasis in the true pelvis (hypogastric, obturator, external iliac, or presacral lymph node) N2 Multiple regional lymph node metastasis in the true pelvis (hypogastric, obturator, external iliac, or presacral lymph node metastasis) N3 Lymph node metastasis to the common iliac lymph nodes
  25. PDD (fluorescence cystocopy): uses blue light (400nm) in combination with an intravesical porphyrin- based photosensitizer hexaminolevulinic acid (HAL; HexvixR). In bladder cancer cells, this leads to red fluorescence (640nm) due to high levels of the heme intermediate protoporphyrin IX.
  26. NBI is a patented filter technology that uses only blue and green light, thus creating a significantly highercontrast between blood vessels and the surrounding tissue than WLI. Because NBI is a purely optical system, it does not need any installation and therefore no time-consumingpreparation time. NBI is available with every Olympus Imaging System at a push of a button and therefore generates noadditional procedure costs
  27. non–muscle-invasive bladder cancer (NMIBC) is the term commonly applied to malignant urothelial tumors that have not invaded the detrusor muscle of the bladder . The terminology of NMIBC encompasses the relatively benign course of low-grade papillary tumors, the more aggressive clinical course of high-grade tumors including urothelial carcinoma in situ (CIS), and high-grade Ta and T1 tumors
  28. In addition, the 2017 AJCC recommends subcategorization of T1 urothelial carcinoma into T1a (superficial) and T1b (deep) lamina propria invasion (Fig. 135.15) to help stratify the heterogeneous group of T1 tumors, which are at a 50% risk of upstaging to T2 or higher and a 33% risk of being upstaged to non–organ confined (Badalato et al., 2011; Svatek et al., 2010). These stratifications suggest that the deeper the tumor invades into the lamina propria, the worse the survival.
  29. Residual tumor can be as high as 53% in T1 tumors. like tumour located on trigone or bladder neck, multiple tumours
  30. provides good information about the vertical and horizontal extent of the tumour
  31. The risk of prostatic urethra or duct involvement is higher if the tumour is located at the trigone or bladder neck, in the presence of bladder CIS and multiple tumours [143] (LE: 3b).
  32. 23-25% dz upstaging on second turbt
  33. Treatment should be based on a patient’s prognosis. In order to predict, both the short- and long-term risks of disease recurrence and progression in individual patients European Organization for Research and Treatment of Cancer (EORTC)
  34. Risk based management of NMIBC by using European Organization for research and treatment EORTC of cancer risk table is useful method of management, thought its prediction rates are lower in Nepalese population
  35. NMIBC is further subdivided into low-, intermediate-, and high-risk disease. Low-risk NMIBC comprises a primary (i.e., not recurrent), low-grade papillary (Ta), solitary tumors less than 3 cm. Intermediaterisk NMIBC is histologically confirmed by multiple and/or recurrent and/or large (>3 cm) low-grade Ta tumors. High-risk NMIBC involves tumors with any high-grade histologic features (i.e., CIS or T1) (Kamat et al., 2014)
  36. It is believed that tumor cell implantation immediately after transurethral resection is responsible for many early recurrences, and this has been used to explain the observation that initial tumors are most commonly found on the floor and lower sidewalls of the bladder, whereas recurrences are often located near the dome as a result of “flotation” (Heney et al., 1981). Thus intravesical chemotherapy to kill such cells before implantation has been used for decades (Klan et al., 1991; Zincke et al., 1983).
  37. Findings of the present randomized pilot study indicate that continuous bladder irrigation with sterile water after TUR may be comparable to immediate intravesical MMC in preventing tumor recurrence in NMIBC with significantly lower adverse effects
  38. derived from Stremtomyces lavendulae\ Anti tumor antibiotic DNA cross linkage
  39. BCG not only works on bladder cancer by activating the immune system, but also Commercially available strains include Pasteur, Connaught, and Tice
  40. Release of tumor necrosis factor–related apoptosis inducing ligand (TRAIL) also appears to be a key event in propagation of the BCG response and is associated with response to BCG
  41. FAP on BCG surface binds to fibronectin on the cell surface for adsorption after intravesical instillation of BCG; then, the repaired bladder epithelial cells and tumor cells internalize BCG. Through a variety of cell surface receptors and intracellular signal transduction pathways, on the one hand, cell apoptosis, cell necrosis, oxidative stress, and others directly induce tumor cell death; On the other hand, the induced cytokines cause an immune cascade that facilitates the host’s immune system to kill tumor cells. BCG can directly act on many cells in the entire tumor immune microenvironment, such as tumor cells, macrophages, neutrophils, T cells, dendritic cells, and other cells. These cells interact with each other, relying on released cytokines of IL-6 and IL-8 at an early stage to generate cascade reactions and heighten the effect.
  42. A urinalysis is usually performed immediately before instillation to further confirm absence of infection or significant bleeding to decrease the likelihood of systemic uptake of BCG. In the event of a traumatic catheterization, the treatment should be delayed for at least several days, depending on the extent of injury. Some clinicians have advocated that the patient turn from side to side to bathe the entire urothelium, but there is no scientific support for this practice
  43. several studies and AUA guidelines suggest that a 6-week induction course alone is insufficient to obtain an optimal response in many patients and that maintenance therapy is requisite
  44. The results demonstrated statistically significant superiority for BCG compared with MMC for the prevention of tumor progression only if BCG maintenance therapy was provided. With a median follow-up of 26 months, 7.67% of the patients in the BCG group and 9.44% of the patients in the MMC group developed tumor progression
  45. Cystectomy should also be considered in patients whose cancer cannot be reasonably controlled through resection: bulky tumors, inaccessible because of a large bladder or urethral stricture disease, or otherwise not amenable to safe removal endoscopically
  46. Carcinoma in situ can present as a velvet-like, reddish area, indistinguishable from inflammation, or it may not be visible at all If equipment is available, photodynamic diagnosis (PDD) is a useful tool to target the biopsy.
  47. non–muscle-invasive bladder cancer (NMIBC) is the term commonly applied to malignant urothelial tumors that have not invaded the detrusor muscle of the bladder . The terminology of NMIBC encompasses the relatively benign course of low-grade papillary tumors, the more aggressive clinical course of high-grade tumors including urothelial carcinoma in situ (CIS), and high-grade Ta and T1 tumors
  48. BCG not only works on bladder cancer by activating the immune system, but also Commercially available strains include Pasteur, Connaught, and Tice
  49. Should the BCG come into contact with the patient’s skin at the time of administration, an absorbent cloth should be placed over the spillage, which is then disposed of into the cytotoxic waste bag. The area should then be washed thoroughly with copious amounts of soap and water.
  50. and should then be allowed to move freely to ensure the drug has the opportunity to bathe all parts of the bladder mucosa.
  51. Release of tumor necrosis factor–related apoptosis inducing ligand (TRAIL) also appears to be a key event in propagation of the BCG response and is associated with response to BCG
  52. FAP on BCG surface binds to fibronectin on the cell surface for adsorption after intravesical instillation of BCG; then, the repaired bladder epithelial cells and tumor cells internalize BCG. Through a variety of cell surface receptors and intracellular signal transduction pathways, on the one hand, cell apoptosis, cell necrosis, oxidative stress, and others directly induce tumor cell death; On the other hand, the induced cytokines cause an immune cascade that facilitates the host’s immune system to kill tumor cells. BCG can directly act on many cells in the entire tumor immune microenvironment, such as tumor cells, macrophages, neutrophils, T cells, dendritic cells, and other cells. These cells interact with each other, relying on released cytokines of IL-6 and IL-8 at an early stage to generate cascade reactions and heighten the effect.
  53. Prevention: initiate BCG at least 2 weeks post-transurethral resection of the bladder (if no signs and symptoms of haematuria).
  54. several studies and AUA guidelines suggest that a 6-week induction course alone is insufficient to obtain an optimal response in many patients and that maintenance therapy is requisite
  55. Adequate BCG is defined as the completion of at least 5 of 6 doses of an initial induction course plus at least 2 out of 6 doses of a second induction course or 2 out of 3 doses of maintenance therapy.
  56. systemic chemotherapy is often better tolerated before surgery, rather than after surgery when patients may experience a delay in chemotherapy administration because of complications or debilitation. patients who present with micrometastatic disease will receive therapy in a more timely fashion when their burden of disease is potentially low. has the potential to downstage bulky and locally advanced tumors, allowing for a higher likelihood for negative surgical margins that are a known predictor of local recurrence following cystectomy. allows the clinician to assess each individual’s response to therapy.
  57. Methods A total of 526 patients with less than pT2N0 underwent radical cystectomy. Patients were divided into three groups: non-NAC, those who did not receive NAC; partial NAC, those who received less 3 cycles of NAC; and complete NAC, those who received 3 cycles of NAC. Translatinal andrology and urology journal.
  58. The European Association of Urology guidelines currently recommend neoadjuvant chemotherapy for T2-T4aN0M0 patients and also note that it should always be a cisplatinum-based combination regimen.
  59. Non urothelial tumors responds poorly to CT and RT.
  60. The inclusion of entire prostate and extend of urethrectomy and vaginal resection has recently been questioned Autopsy studies shows 23-54% incidence of prostatic cancer in cystoprostectomy specimens
  61. Level 1 included lymph nodes below the common iliac bifurcation, level 2 included lymph nodes above the common iliac bifurcation but below the aortic bifurcation, and level 3 included lymph nodes to the level of the inferior mesenteric artery. The limited node dissection included the pelvic sidewall between the genitofemoral and obturator nerves, and the bifurcation of the iliac vessels to the circumflex iliac vein.
  62. The anatomic boundaries of a standard template dissection consist of the genitofemoral nerves laterally, the internal iliac artery medially, Cooper ligament inferiorly, and the point at which the ureter crosses the common iliac artery superiorly. A standard pelvic lymph node dissection was defined superiorly by the iliac bifurcation and included the external iliac, hypogastric, and obturator lymph node packets.
  63. advanced disease, an extended dissection inclusive of the entire common iliac lymph node packet and the presacral lymph node packet can be obtained. An extended dissection also included the nodal packets to the level of the aortic bifurcation to no more than 2 cm proximal to the bifurcation.
  64. the authors predicted a 75% chance of identifying one or more lymph node metastases if 25 nodes were removed. This probability improved to 90% with 45 nodes and decreased to 50% if 15 to 25 nodes were removed, suggesting a 25-node minimum as a reasonable cut-off to adequately stage and detect lymph node metastasis
  65. There are several risk factors for upper tract recurrence following cystectomy including bladder CIS, distal ureteral involvement with tumor, and high-grade pTa-T1 disease.
  66. Lymph node status appears to be the single greatest predictor of disease outcome. Node-positive disease confer a poor prognosis with 5-year disease-specific survival rates ranging from 21% to 35%. However, long-term survival has been reported in patients with low-volume lymph node metastasis (Steven et al,2007; Dhar et al, 2008; Bruins et al, 2009; Rink et al, 2013).
  67. Currently the NCCN guidelines favor neoadjuvant chemotherapy instead of adjuvant chemotherapy based on higher-level evidence data; however, the guidelines do suggest considering adjuvant chemotherapy in the setting of pT3-4 or node positive disease based on the available data. The EUA guidelines currently recommend adjuvant chemotherapy within clinical trials but not as a routine therapeutic option, as randomized trials and meta-analyses have not provided sufficient evidence to support routine use
  68. 0=active, able to carry on all pre-disease performance without restriction 1Restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature, e.g., light house work, office 2Ambulatory and capable of all selfcare but unable to carry out any work activities; up and about more than 50% of waking hours 3Capable of only limited selfcare; confined to bed or chair more than 50% of waking hours 4Completely disabled; cannot carry on any selfcare; totally confined to bed or chair 5Dead
  69. GC = gemcitabine plus cisplatin; GFR = glomular filtration rate; HD-MVAC = (high-dose) methotrexate, vinblastine, adriamycin plus cisplatin; PCG = paclitaxel, cisplatin, gemcitabine; PS = performance status
  70. 21% increased risk of fractures (chronic metabolic acidosis and subsequent long-term bone loss). low vitamin B12= 17% of patients with bowel diversion, vitamin B12 levels should be measured annually.