This document provides an overview of renal cell carcinoma (RCC). It discusses the epidemiology, etiology, molecular genetics, classification, clinical presentation, imaging, and TNM staging of RCC. Some key points include:
- RCC accounts for 2-3% of all cancers and 90% of renal malignancies. Risk factors include tobacco, obesity, hypertension, and family history.
- Clear cell RCC is the most common type, accounting for 70-80% of cases. Other types include papillary and chromophobe RCC.
- RCC is often asymptomatic and detected incidentally via imaging such as ultrasound, CT, or MRI. When symptomatic, it can present with hematuria
Management of renal cell carcinoma - presented at Asian Oncology Summit 2013Siewhong Ho
Dr Ho lectured at the Asian Oncology Summit 2013 in Bangkok on the surgical opinion on management of renal cell carcinoma. He presented to a varied audience of medical oncologist, radiation oncologist, urologists, researchers, para clinical staff and nurses. The most interesting aspect of the lecture was on the role of urologists in management of Stage 4 kidney cancer in the era of 'targeted therapy'. The role of cytoreductive nephrectomy was reviewed potential future developments in this area was discussed
Management of renal cell carcinoma - presented at Asian Oncology Summit 2013Siewhong Ho
Dr Ho lectured at the Asian Oncology Summit 2013 in Bangkok on the surgical opinion on management of renal cell carcinoma. He presented to a varied audience of medical oncologist, radiation oncologist, urologists, researchers, para clinical staff and nurses. The most interesting aspect of the lecture was on the role of urologists in management of Stage 4 kidney cancer in the era of 'targeted therapy'. The role of cytoreductive nephrectomy was reviewed potential future developments in this area was discussed
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
4. Epidemiology
• 2- 3% of all cancers and 90 % of renal malignancy 1
• male-to-female 1.9 : 1 1 1.5:1 2
• peak incidence between 55 and 75 years of age 2
• Majority are sporadic; only 4% to 6% are familial 3
• highest incidence occurring in Western countries 4
1 Siegel et al., 2017
2 Thorstenson, A., et al. 2014
3 Schmidt and Linehan, 2016
4 Chow et al., 2013
5. Etiology
• Tobacco exposure, RR 1.4 to 2.5 1
• Obesity, RR 1.07 for each additional unit of body mass index 2
• Hypertension 3
• Chemical exposure like aromatic hydrocarbons, trichloroethylene, asbestos or
cadmium, rubber, metals and paints 4
• family history of RCC RR 2.9 for 1st and 2nd degree relative with RCC 5
1. Cote et al., 2012; Cumberbatch et al., 2016
2. Bagheri et al., 2016; Ito et al., 2017
3. Colt et al., 2017; Lipworth et al., 2006; Ljungberg et al., 2011
4. Ishida et al., 2015
5. Gago-Dominguez et al., 2001.
6. • Regular usage of NSAID, RR 1.51; 1
• increased intake of dairy products, and increased consumption of coffee or tea ; 2
• Retroperitoneal radiation therapy; 3
• increased incidence in ESRD, patient on dialysis and certain familial syndromes
such as tuberous sclerosis, VHL ; 4
• Moderate alcohol consumption appears to have a protective effect 5
1. Cho et al., 2011
2. Ljungberg et al., 2011
3. Romanenko et al., 2009
4. Schmidt and Linehan, 2016
5. Bellocco, R., et al. Alcohol drinking and risk of renal cell carcinoma: results of a meta-analysis. Ann Oncol,
2012. 23: 2235.
7. Molecular Genetics
• Mutation in Chromosome 3 1
• Trisomy for chromosomes 7 and 17 as well as abnormalities on
chromosomes 1, 4, 7, 12, 16, 20; 1
• Translocations involving the TFE3 gene on chromosome Xp11, leading
to TFE3 overexpression; 2
• Defect in VHL , MET, Folliculin, PTEN gene associated 1
1. Schmidt and Linehan, 2016
2. Brok et al., Biology and treatment of renal tumours in childhood, Eur J Cancer 68:179–195, 2016
8. Alfred G. Knudson et al; 1970
Campbell-Walsh- Wein Urology, 12 th edition
13. Conventional or clear-cell RCC
• Derived from proximal convoluted tubule 1
• 70% to 80% of all RCCs 1
• VHL gene defects in up to 60% either mutation or hypermethylation 2
• Chromosome 3p deletions or gain of chromosome 5q 2
• Aggressive behavior 1
1. Deng and Melamed, 2012; Moch et al., 2016;
2. Cancer Genome Atlas Research Network, 2013
14. • Typically well circumscribed, lobulated, golden yellow tumor but can be
infiltrative necrosis, hemorrhage, and cystic degeneration common, sometime
venous involvement
15. Papillary RCC
• Originates from proximal tubule 1
• 10% -15% of all RCC 1
• Loss of chromosome 4 and Y, trisomy 7 &17 or Mutation of C-MET proto-
oncogene in 13%. 2
• Acquired cystic disease and ESRD 3
• Multicentricity in 40%
1. Moch et al., 2016
2. Cancer Genome Atlas Research Network, 2013
3. Pal et al., 2018
17. Chromophobe RCC
• Origin: distal convoluted tubules or intercalated cells of collecting duct 1
• 3% to 5% of all RCCs 1
• Birt-Hogg-Dube (BHD) syndrome
• Folliculin (FLCN) gene mutation (17p11) or Loss of multiple
chromosomes (1, 2, 6, 10, 13, 17, 21, Y) or PTEN mutations 2
1. Algaba et al., 2011; Davis et al., 2014
2. Cancer Genome Atlas Research Network, 2013
19. Collecting Duct Carcinoma (of Bellini)
• Arise from medullary collecting ducts 1
• Younger patients
• Usually high grade, aggressive tumor with poor prognosis 1
• May share features in common with urothelial carcinoma, 2
1. Seo et al., 2017; Sui et al., 2017
2. Wright et al., 2009
20. Renal medullary carcinoma
• Originates from collecting duct
• Affects mostly young African-Americans 1
• Almost exclusively with sickle cell disease 1
• Highly aggressive and usually presents in 3rd decade with widespread
metastasis with low Life expectancy 1
1. Moch et al., 2016; Swartz et al., 2002
21. Clinical Presentation
• Incidental finding in over 60%
Symptoms of localized or locally advanced disease
• Haematuria
• Loin Pain
• Palpable Mass
• Classical Triad of hematuria, loin pain, mass in 10% “too late triad.”
Beisland, 2017; O’Connor et al., 2011
Campbell-Walsh- Wein Urology, 12 th edition
22. Symptoms of systemic disease
• Persistent cough
• Bone pain
• Cervical lymphadenopathy
• Constitutional symptoms like Weight loss, fever, malaise, night
sweating
Obstruction of the inferior vena cava
• Bilateral lower extremity edema
• Nonreducing or right-sided varicocele
Xie et al., 2017; Zhang et al., 2002
Campbell-Walsh- Wein Urology, 12 th edition
23. Paraneoplastic Syndrome (10% to 20%)
• Hypercalcaemia (PTHrP) – seen in approximately 13% 1
• Raised ESR seen in more then 50% 1
• Polycythaemia - may be associated with increased response to IFN 2
• Hypertension 2
• Stauffer’s syndrome: Abnormal LFT, Hepatic necrosis, Thrombocytopenia,
Neutropenia 3
1. Schwarzberg and Michaelson, 2009
2. Moreira et al., 2016
3. Kranidiotis et al., 2009
24. Take home
• The majority of cases of RCC are sporadic, 4-6% are familial
• Tobacco consumption, obesity and hypertension are the major risk
factor for development of RCC
• Different gene involved, multifactorial.
• Usually detected incidentally
26. Ultrasound
• sensitivity of 46% and specificity of 12% 1
• Colour Doppler USG: Sensitivity of 47% and specificity of 55% 1
• Color Doppler : venous tumor thrombus
C. Vogel et al. Imaging in Suspected Renal Cell Carcinoma: A Systematic Review
28. Carlo Trombetta et al; 2007; Evaluation of tumor thrombi in the inferior vena cava with intraoperative ultrasound
29. Contrast-enhanced ultrasound (CEUS)
FOR COMPLEX CYST
sensitivity of 94.5% and
specificity of 69%
IN DIFFERENTIATION OF RCC
FROM AML
sensitivity and specificity values
of 89% and 96%
renal vein invasion,
sensitivity 83% and specificity
96%
30. Yingyu Cai et al; Quantification of Enhancement of Renal Parenchymal Masses with Contrast-Enhanced Ultrasound
31. Computerized Tomograpy
• sensitivity of 88% and specificity of 75%
• Tumor location and complexity describe the relationship of the mass
with the renal hilum, collecting system, polarity, and endophytic
versus exophytic location
• Composite complexity profiles include the Renal nephrometry score,
the PADUA score, and the C-index
Davenport et al., 2017
Campbell-Walsh- Wein Urology, 12th edition
32.
33. • score of 4-6: low complexity
• score of 7-9: moderate complexity
• score of 10-12: high complexity
34.
35.
36. • score of 6-7: low complexity
• score of 8-9: moderate
complexity
• score of >10: high complexity
38. SAMPLE
SIZE : 50
C-index fared better than other two SS in
predicting trifecta outcomes; however, it is
difficult to calculate and has highest
interobserver variability.
39. MRI
• alternate standard imaging modality
• Enhancement of greater than 20% with intravenous gadolinium-based
contrast on MRI is suggestive of RCC 1
• Useful in masses smaller than 2 cm 1
• Complication nephrogenic systemic fibrosis (NSF) in patients with
CKD on dialysis 2
1. Donat et al., 2013
2. Bach and Zhang, 2008
45. Renal tumour biopsy
• histology of radiologically indeterminate renal masses.
• considered in patients
- who are candidates for AS of small masses.
- obtain histology before ablative treatments.
- select the most suitable medical and surgical treatment strategy in the setting of metastatic
disease.
• not indicated for comorbid and frail patients who and considered only for conservative
management (watchful waiting) regardless of biopsy results.
46. Renal Biopsy
• Percutaneous sampling can be performed under local anaesthesia with needle core biopsy and/
or fine needle aspiration (FNA).
• Biopsies can be performed under US or CT guidance, with a similar diagnostic yield [130, 134](LE:
2b).
• Eighteen-gauge needles are ideal for core biopsies, as they result in low morbidity and provide
sufficient tissue for diagnosis [127, 131, 135](LE: 2b).
• A coaxial technique allowing multiple biopsies through a coaxial cannula should always be used
to avoid potential tumour seeding
48. T1 Tumour <7 cm or less in greatest
dimension, limited to the kidney
49. Active surveillance(AS)
• Elderly and comorbid patients with incidental small renal masses have a low RCC-specific
mortality and significant competing-cause mortality [293, 294].
• Initial monitoring of tumour size by serial abdominal imaging (US, CT, or MRI) with delayed
intervention reserved for tumours showing clinical progression during follow-up [295].
• AS differs Vs watchful waiting;
- watchful waiting is reserved for patients whose comorbidities contraindicate any subsequent
active treatment and do not require follow-up imaging, unless clinically indicated.
50. Active surveillance
• Subsequent series have confirmed that many small renal masses
- will grow relatively slowly (median growth rate 0.12 to 0.34 cm/yr).
- and with a relatively low rate of metastasis (1.2% to 2.0% during 2 to 4 years of follow-up)
- AS may be a reasonable management strategy in carefully selected patients who are not
candidates for conventional surgery or thermal ablative approach. (Campbellet al, 2009;
Smaldone et al, 2012)s
51. Active surveillance
• AS is not appropriate for patients
- with larger (>3 to 4 cm)
- poorly marginated
- nonhomogeneous solid renal lesions
- when biopsy indicates a potentially aggressive RCC,except in patients with limited life
expectancy(Remzi et al, 2006; Kunkle et al, 2007).
• AS is also not advisable in younger, otherwise healthy, patients with small, solid tumors that have
radiographic characteristics consistent with RCC(Campbell et al, 2009; Lane et al, 2012)
53. Thermal Ablative Therapies
1)renal cryosurgery
2) radiofrequency ablation (RFA)
• have emerged as alternative nephron-sparing treatments for patients with localized RCC (Murphy
and Gill, 2001; Sterrett et al, 2008)
• Both can be administered percutaneously or through laparoscopic exposure and thus offer the
potential for reduced morbidity and more rapid recovery (Johnson et al, 2004; Sterrett et al, 2008)
54. Thermal Ablative
• Ideal candidates for TA procedures may be
- patients with advanced age
- significant comorbidities
- who prefer a proactive approach but are not optimal candidates for conventional surgery
- patients with local recurrence after previous nephron-sparing surgery
- with hereditary renal cancer who present with multifocal lesions for which multiple PNs might
be cumbersome (Kunkle et al, 2008)
55. Renal Cryosurgery
• predates that of RFA and has been more extensive (Sterrett et al, 2008).
• rapid freezing, gradual thawing, and a repetition of the freeze-thaw cycle.
• Tissue cryodestruction involve immediate membrane and cellular damage followed by micro-
circulatory failure(Stein and Kaouk, 2007).
• Delayed microcirculatory failure occurs during the slow thaw phase of the freeze-thaw cycle, leading
to circulation arrest and cellular anoxia.
• Target lethal temperature of −20°C was achieved at a distance of 3.1 mm inside the leading edge of the
iceball as visualized by real-time USG.
56. Complications of cryoablation
• renal fracture
• Hemorrhage
• adjacent organ injury
• ileus
• wound infection
• major morbidity is decidedly uncommon
(Sidana et al, 2010; Tsivian et al, 2010).
57. RFA
• Application of high-frequency electrical current by RFA induces lethal sequence of
events
• observed at tissue temperatures above 41°C but increase directly with increasing
temperature and duration of treatment (Sterrettet al, 2008).
• Temperatures in excess of 100°C are typically obtained at the tips of the probes, and
thermosensors can be used to monitor progress.
• Temperature dissipates at points more distant from the probe tip, and multiple probes or
tynes are typically required to achieve adequate heating of the entire region of interest
(Murphy and Gill, 2001)
excitation of ions frictional forces heat
denaturation of intracellular proteins and
melting of cellular membranes
58. • Complications from RFA are uncommon
- acute renal failure
- stricture of the ureteropelvic junction
- necrotizing pancreatitis
- lumbar radiculopathy.
59.
60. New modalities
These techniques are considered experimental.
• high-intensity focused ultrasound (HIFU)
• image-guided radio-surgical treatments (CyberKnife)
• microwave ablation
• laser Ablation
• irreversible electroporation
are also under development and may allow extracorporeal treatment of small renal tumors in
the future (Ponsky et al, 2007; Haber et al, 2010; Kroeze et al,2012)
61. Embolisation
• Before routine nephrectomy, tumour embolisation has no benefit.
• In patients unfit for surgery, or with non-resectable disease, embolisation can control symptoms,
including visible haematuria or flank pain .
Summary of evidence LE
In patients unfit for surgery with massive haematuria or flank pain,
embolisation can be a beneficial
palliative approach.
3
Recommendations Strength
rating
Offer embolisation to patients unfit for surgery presenting with massive
haematuria or flank pain.
weak
EAU Guidelines
64. Nephron sparing surgery
Absolute indications
1. Bilateral RCC
2. RCC in solitary functioning kidney
Relative indication
1. Unilateral RCC with reduced or poorly functioning contralateral kidney
(hydronephrosis, chronic pyelonephritis, ureteral reflux, calculus disease)
2. Unilateral RCC in patients with co-morbidity associated with potential renal impairment( DM,
Renovascular disease).
3. Patients with an increased risk of second renal malignancy ( Hereditary RCC such as von Hippel-Lindau
disease)
Elective indications
Localised unilateral RCC with normal contralateral kidney.
65. Relative contraindications to partial
nephrectomy
Technical issues
• Cold ischemia time greater than 45 minutes (consider extra-corporeal approach)
• Less than 20% of global nephron mass retained
Cancer-related issues
• Diffuse encasement of renal pedicle by tumor
• Diffuse invasion of central collecting system
• Tumor thrombus involving major renal veins
• Adjacent organ invasion (stage cT4)
• Regional lymphadenopathy (stage cTxN1)
66. • score of 4-6: low
complexity
• score of 7-9: moderate
complexity
• score of 10-12: high
complexity
67. HISTORY
• The first partial nephrectomy was performed in 1884
by Wells for removal of a perirenal fibrolipoma
• In 1887, Czerny was the first to use partial
nephrectomy for excision of a renal neoplasm
68. DEFINITION
Complete local resection of diseased renal
parenchyma leaving the largest possible
amount of normal functioning parenchyma in
the involved kidney
69. INTRAOPERATIVE RENAL ISCHEMIA
• Occlusion of the renal artery(<30mins).
• diminishes intraoperative renal bleeding but also improves access to intrarenal
structures by causing the kidney to contract and by reducing renal tissue turgor.
• cellular injury due to imbalance between oxygen delivery and demand
• Endothelial injury due to leukocyte activation[cytokines, chemokines,
eicosanoids] and release of vasoactive substances >> swelling and cell injury
71. • The impairment is least when the renal artery alone is
continuously occluded.
• Continuous occlusion of artery and vein for an equal time
interval is more damaging, because it prevents retrograde
perfusion of the kidney through the renal vein and may also
produce venous congestion of the kidney.
• Intermittent clamping artery is more damaging than
continuous; because of the release and trapping of
vasoconstrictor agents within the kidney.
• Manual renal compression to control intraoperative
hemorrhage is more deleterious than simple arterial
occlusion.
72. Prevention of Ischemic Renal Damage
General measures
• Preoperative and intraoperative hydration.
• Prevention of hypotension.
• Avoidance of unnecessary manipulation or traction on the renal
artery.
• Intraoperative administration of mannitol.
73. Mannitol
• Mannitol is most effective when it is given 5 to 15 minutes before arterial occlusion (20%-
1mg/kg).
- increases renal plasma flow,
- decreases intrarenal vascular resistance,
- minimizes intracellular edema,
- and promotes an osmotic diuresis when renal circulation is restored.
80. Essential Steps
1) Expose and thoroughly mobilize the kidney.
2) Obtain control of the renal pedicle.
3) Cool the kidney with ice slush.
4) Excise the tumor with a rim of normal renal parenchyma.
5) Perform the appropriate renal reconstruction and obtain hemostasis within the resection bed.
6) Cover the repair with perirenal fat, Gerota’s fascia, or omentum.
7) Place a drain
81. • On the right:The hepatic flexure and duodenum were mobilized, freeing the kidney
superiorly and medially.
• On the left:The splenorenal ligament was mobilized, freeing the kidney superiorly.
• Using sharp and blunt dissection, the retroperitoneal fascia overlying the renal
vessels was separated, exposing the underlying main renal vein, which was carefully
dissected, mobilized, and encircled with a loop.
• Using gentle retraction on the renal vein, the main renal artery was identified deep
to this, dissected, and surrounded with a vessel loop.
• Having achieved control of the main renal vessels, attention was turned to the
kidney
82. General considerations
• Remove the perinephric fat around the normal parts of kidney. Don’t remove the perinephric fat over tumour.
• Mark the tumor and excise with caultry
• Visible open blood vessels are sutured with figure of 8 sutures
• Push 10ml methylene blue 1:1 diluted through RGC or into directly into renal pelvis; collecting system and clamp ureter and look
for collecting system leak.
• If any calyceal system opening is seen – close it by absorbable suture.(4-0)
• Close kidney over after Hemostasis achieved
• Kidney fixed to posterior musculature to avoid flipping
84. Enucleation for Small Cortical Tumors
• Enucleation is indicated
- von Hippel–Lindau disease and
- multiple low-stage encapsulated tumors.
• surrounded by a distinct pseudocapsule of fibrous tissue
• circumferential incision of the renal parenchyma around the
tumor at any location, often with no vascular occlusion.
• higher risk of leaving residual malignant cells in the kidney.
85. Segmental Nephrectomy for Large Polar Tumors
• Indication: large polar(upper or lower)
tumors
• Performed by isolation and ligation of the segmental apical or basilar arterial branch.
• The apical artery is dissected, ligated, and divided
86. • A bulldog clamp is applied to the apical segmental artery (or basilar segmental artery for lower
pole tumors) and the line of ischemia is
observed.
• line of ischemia is optimal site for transection of kidney and marked with electrocautery.
• The apical segmental artery is ligated, then the renal pedicle is clamped en bloc with a curved
Satinsky clamp.
• ice slush
• renal capsule is incised along the line of ischemia.
87. WEDGE RESECTION
• Bleeding vessels: figure of eight
suture or argon beam or bipolar
cautery.
• Collecting system involvement:
checked with 10-20ml of diluted
indigo carmine injected into
pelvis, ureter clamped and
checked for leak if present closed
with 4-0 absorbable suture.
88. EXTRACORPOREAL PARTIAL NEPHRECTOMY(ECRS)
AND AUTOTRANSPLANTATION
• It was described by Calne 1973, Gittes and McCullough 1975
• Malignancy in solitary kidney
1. large central mass encroaching on the renal pedicle.
2. large, central renal pelvis tumor.
3. multiple subcorticle neoplasms.
ADVANTAGES
• Optimum exposure
• Bloodless surgical field
• Maximum conservation of renal parenchyma
• Greater protection of the kidney from prolonged ischemia
• opportunity to use an operating microscope.
89. A, The kidney is removed outside Gerota's fascia.
B, The tumor is excised extracorporeally
C, Pulsatile perfusion or reflushing is used to identify transected blood vessels
D, The kidney is closed on itself
94. Method of Artery clamping
• Laparoscopic Satinsky clamp –
– Faster en-block clamping.
– Requires an additional 10-12mm port.
– Risk of inadvertent slippage.
– Not useful in retroperitoneal approach – less space.
• Bulldog clamp –
– application requires meticulous artery dissection
– Technical difficulty in manipulation – may increase WIT.
95. • Vascular Torniquet*
– Doesn’t require additional port.
– Not limited by number of vessels.
– Can be left in-situ after reperfusion for emergency re-occlusion if needed
105. Definition of radical nephrectomy
• Classically Robson describe Radical nephrectomy as
complete removal of the kidney outside the Gerota’s fascia
together with the ipsilateral adrenal gland and complete
regional lymphadenectomy from the crus of the diaphragm
to the aortic bifurcation. 1
• Nowadays the definition has changed , adrenalectomy and
lymphadenectomy is not performed until it is involved 2
1. Robson et al. (1969)
2. Shah et al., 2017b
106. Indication
• tumors in nonfunctional kidneys,
• large tumors replacing the majority of renal parenchyma,
• tumors associated with detectable regional lymphadenopathy,
• tumors associated with renal vein thrombus.
• Tumors invading collecting system
Campbell-Walsh- Wein Urology, 12th edi
107. Surgical Procedure
Position : modified lateral decubitus position
incisions : subcostal flank
Campbell-Walsh- Wein Urology, 12th edit
108. On right
• The posterior parietal peritoneum on the white line of Toldt is incised from
the pelvis (region of the iliac artery) to the right upper quadrant (region of
hepatic flexure).
• anterior pararenal space is developed by dissecting in the plane between
the anterior renal fascia and the mesentery of the ascending colon.
• After mobilizing the hepatic flexure of the colon using sharp and blunt
dissection, the second part of the duodenum is mobilized medially using
the Kocher maneuver .
• With medially located tumors, mobilization of the duodenum should be
performed with extreme care to avoid injury.
Campbell-Walsh- Wein Urology, 12th editi
110. • After mobilization of the duodenum, the IVC is identified posteriorly.
• Dissection anterior to the IVC will enable identification of the renal
vein and gonadal vein. Placement of a vessel loop will enable gentle
traction of the renal vein
• The renal vein is palpated for any tumor thrombus.
Campbell-Walsh- Wein Urology, 12th edi
111. • Next the renal artery is
identified posterior to the
renal vein.
• If identification of the
renal artery is difficult,
attention is turned to the
lower pole of the kidney
to identify the ureter and
gonadal vein.
112. • If technically feasible, the gonadal vein is spared. However, often
because of the large size of the renal tumor, the gonadal vein cannot
be safely left intact without the risk for avulsion from the IVC
• With ligation of the ureter, the kidney is lifted from a posterior to an
anterior position to aid in identification of the renal artery posterior
to the kidney.
Campbell-Walsh- Wein Urology, 12th ed
113. • With the renal artery controlled, the right kidney and tumor will
decrease in size and engorgement, easing the dissection of the kidney
at the hilum and the remaining sites.
• The right renal vein, which should now be flaccid, is examined for any
tumor thrombus
Campbell-Walsh- Wein Urology, 12th ed
114. On left
• Incision of the white line of Toldt from the splenic flexure to the common
iliac artery, the descending colon is reflected medially.
• The renocolic ligament is divided, and extreme care is taken to avoid injury
to the tail of the pancreas.
• The left renal vein is identified using the anterior surface of the aorta as a
guide.
• The left renal artery is usually located cranial and posterior to the left renal
vein.
Campbell-Walsh- Wein Urology, 12th edit
115. • After further mobilization of the lower pole of the kidney, the left ureter
and the left gonadal vein are identified.
• The left gonadal vein can be traced to its insertion to help identify the left
renal vein.
• The ureter is divided, and the inferior and posterior surface of the kidney is
mobilized to identify the left renal artery.
• Once the renal artery and vein are identified, the renal artery is ligated and
divided first then follows the vein.
Campbell-Walsh- Wein Urology, 12th edit
116. • Sometimes renal artery and vein cannot be separated individually
because of significant hilar lymphadenopathy or adhesion.
• Then, a whole pedicle clamp technique may be utilized to control the
hilar vessels. Although the risk for arteriovenous fistula may be
associated with en bloc ligation of the whole renal pedicle.
Campbell-Walsh- Wein Urology, 12th edition
117. Complications
Intra-operative Bleeding
Trauma to adjacent organs
Tumor seeding
Pneumothorax
Post-operative Bleeding
Infection
AKI
late HTN
Tumor recurrance
Aneurysm, Pseudoaneurysm
AV fistula
118. Adrenalectomy
• overall incidence of adrenal metastasis is less than 5% 1
• Indications 2
diffuse involvement by tumor,
large tumor size of upper pole (>10 cm),
extrarenal tumor extension,
tumor thrombus,
lymphadenopathy and regional metastasis, or an adrenal mass on
imaging.
1. Siemer et al., 2004
2. Campbell-Walsh- Wein Urology, 12th ed
119. Regional lymphadenectomy
• incidence of lymph node disease is about 5% 1
• The role of regional lymphadenectomy on RCC has remained controversial 2
• Indications 3
enlarged lymph nodes on imaging,
cytoreductive surgery for metastatic disease,
tumor size greater than 10 cm, nuclear grade 3 or greater,
sarcomatoid histology,
presence of tumor necrosis on imaging,
extrarenal tumor extension, and
tumor thrombus 1. Capitanio et al., 2013;
2. Sun et al., 2014
3. Campbell-Walsh- Wein Urology, 12th edition
120.
121. Sample size: 772
RCC with N0M0 and
resectable, patients were
randomly into two group
Conclusion: The incidence of
unsuspected lymph-node metastases
is 4.0% and no survival advantage of
a complete lymph-node dissection in
conjunction with a radical
nephrectomy alone .
122. Conclusion:
• The existing literature does not support a survival benefit with LND in either
M0 or M1 RCC
• A small subset of patients with isolated nodal metastases experience long-
term survival after surgical resection.
123. Forest plot for meta-analysis of the association of lymph node dissection with oncological outcomes among M0 and
M1 patients. LND, lymph node dissection.
124. Inferior Vena Cava Involvement
• 4% to 10% of patients with RCC 1
• 45-70 % of patients with venous tumor thrombus can be cured with
nephrectomy and thrombectomy 1
• two components associated with IVC thrombi are tumor thrombus (tumor
cells contained within bland thrombus) and bland thrombus (blood
coagulum without tumor cells) 2
• In RCC with venous thrombus, 10% have associated positive regional lymph
nodes, 25% have associated metastases, and 50% have perirenal fat
invasion 2
1. Blute et al., 2004b;
2. Martinez-Salamanca et al., 2011
125. • MRI, CECT, and echocardiography are useful adjuncts in the pre- and
perioperative planning
• MRI is the preferred diagnostic study at many centers , however,
recent literature indicates that an appropriately performed CT can
provide essentially equivalent information
• venacavography, is rarely used and reserved for patients whom MRI
and CT are contraindicated
Pouliot et al., 2010
Campbell-Walsh- Wein Urology, 12th edition
126. Preoperative Considerations
• Anticoagulation with intravenous or low-molecular-weight heparin to
be started
• Temporary suprarenal IVC filters are also an option for patients with
level I, and II tumor thrombi but controversial as provoke
embolization to contralateral renal vein and hepatic vein
• Preoperative angioembolization can be considered because tumor
thrombi have an independent blood supply arising from the renal
artery and/or aorta in one-third of cases
Campbell-Walsh- Wein Urology, 12th edition
127. Mayo classification of macroscopic venous invasion
Level I: The tumor thrombus is either at the entry of the renal vein or within the IVC < 2 cm from the confluence of the renal vein and the IVC.
Level I IVC thrombus managed with a Satinsky clamp to achieve vascular isolation.
128. Level II: The thrombus extends within the IVC > 2 cm above the confluence of the renal vein and the IVC but still remains below the hepatic veins.
Level II IVC thrombus managed by sequential clamping of the
For right side lower IVC, contralateral renal vein, and cephalad IVC, along with mobilization of the IVC and occlusion of lumbar veins, allowing for vascular isolation
For left side Vascular control is obtained sequentially in the following order: (1) the ipsilateral (left) renal artery is ligated, (2) the infrarenal IVC is clamped, (3) the contralateral (right) renal
vein is clamped, (4) the suprarenal IVC is clamped,
129. Level III: The thrombus involves the intrahepatic IVC. The size of the thrombus ranges from a narrow tail that extends into the IVC to one that fills the lumen and enlarges the IVC.
Level III IVC thrombus managed by mobilization of the liver, providing exposure of the intrahepatic IVC and retraction of the thrombus to facilitate placement of the upper IVC clamp just below the level of the hepatic veins. Through this approach vascular
isolation is achieved in a manner similar to that in B. If the cephalad clamp must be placed above the level of the hepatic veins, a Pringle maneuver should be performed to temporarily occlude the hepatic blood flow
130.
131. Patching, Replacing, and Interrupting the
Inferior Vena Cava
• If the IVC is expected to be less than 50%
of its original size, a patch cavoplasty is
necessary to prevent IVC stenosis and
thrombosis-related events.
• Autologous and bovine pericardium,
polytetrafluoroethylene (PTFE), collagen-
impregnated Dacron , or autologous
saphenous vein are materials that can be
used for patch cavoplasty.
132.
133. Conclusion,
• In patients with non-metastatic RCC with thrombus, independent predictors of
recurrence include: BMI ≤20 kg/m2, preoperative haemoglobin , perinephric fat
invasion, IVC thrombus height, tumour diameter, nuclear grade and non-clear-cell
histology. Patients with >2 risk factors are at highest risk of recurrence and should
be considered for adjuvant therapy trials or increased surveillance.
134. • Conclusions
• Survival in patients with pT4 remains poor. pT4 is associated with a
locally and regionally invasive biology that requires specific attention
and warrants careful study
135. Complications
Intra-operative Air Embolism
Acute Pulmonary Embolism
Massive Hemorrhage
Hepatic dysfunction
Organ Ischemia
Trauma to adjacent organs
Post-op Hemorrhage
Infection
late Tumor recurrance
Aneurysm,
Pseudoaneurysm
AV fistula
136.
137.
138.
139. Conclusions
The addition of adjuvant
therapy provided no survival
benefit but increased the rates
of adverse events for locally
advanced RCC patients.
• Twelve studies (5,936
patients)
• compared to placebo or
observation
• targeted therapy, and
immune therapy
140. Double-blind, phase 3
trial, randomization with
1:1 ratio, patients after
nephrectomy, with or
without metastasectomy,
to receive either adjuvant
pembrolizumab
total of 496 patients
were randomly
assigned to receive
pembrolizumab, and
498 to receive placebo
Conclusion:
Pembrolizumab treatment
led to a significant
improvement in disease-
free survival as compared
with placebo after surgery
among patients with
kidney cancer
RCC (also known as hypernephroma, since it was erroneously believed to originate in the adrenal gland, clear cell carcinoma, and Grawitz tumour
RCC was previously referred to as the internist’s tumor because of the predominance of systemic rather than local manifestations.
Now, a more appropriate name for RCC would be the radiologist’s tumor, given the frequency of incidental detection
Metastatic disease in 30% at diagnosis, and eventually in 50% (lung, liver, bone, distant LN, adrenal, brain, opposite kidney, soft tissue)
Relative risk is directly related to duration of smoking and begins to fall after cessation, further supporting a cause-and-effect relationship Tobacco use accounts for 20% to 30% of cases of RCC in men and 10% to 20% in women.
Increased prevalence of obesity has likely contributed to the increased incidence of RCC in Western countries. Although RCC is more prevalent in patients with higher BMI, increased BMI is also associated with lower stage RCC at presentation, a so-called “obesity paradox”. Potential mechanisms linking obesity to RCC include increased insulin-like growth factor-1 expression, increased circulating estrogen levels, and increased arteriolar nephrosclerosis and local inflammation
Diuretics and other antihypertensive medications have also been implicated, particularly for papillary RCC (Colt et al., 2017). However, the weight of the epidemiologic evidence suggests that it is the underlying disorder, hypertension, rather than the treatment that increases the risk of RCC (Colt et al., 2017; Lipworth et al., 2006; Ljungberg et al., 2011). The proposed mechanisms are hypertension-induced renal injury and inflammation or metabolic or functional changes in the renal tubules that may increase susceptibility to carcinogens
regular usage of nonsteroidal anti-inflammatory drugs, which was associated with a relative risk of 1.51, whereas aspirin and acetaminophen were not associated with increased risk
Case-control studies have shown that RCC is more common among individuals with low socioeconomic status and urban background, although the causative factors have not been defined.
Retroperitoneal radiation therapy, typically administered for Wilms tumor or testicular cancer, appears to be a risk factor for RCC, although the relative risks are low
7TFE3 protein overexpression leads to a distinct pathologic subtype of RCC that exhibits clear cell and papillary features but may respond to chemotherapeutic or targeted molecular agents
a gene product that could suppress tumor development must be involved and that both alleles of this “tumor suppressor gene” must be mutated or inactivated for tumorigenesis to occur.
Knudson postulated that patients with familial cancers are born with one mutant allele and that all cells in that organ or tissue are at risk, accounting for the early onset and multifocal nature of the disease. In contrast, sporadic tumors develop only if a mutation occurs in both alleles within the same cell; because each event occurs with low frequency, most tumors develop late in life
VHL characterized by phaeochromocytoma, renal and pancreatic cysts, and cerebellar haemangioblastoma, develop RCC,
RCC develops in about 50% of patients with VHL disease and is distinctive for early age at onset (often in the third to fifth decades of life) and bilateral and multifocal involvement
HPRCC- type 1 papillary rcc
HLRCC- type 2 papillary rcc
SDH RCC: Affected individuals present with bilateral, multifocal, early onset (<40 years) renal tumors, often along with pheochromocytomas and head and neck paragangliomas. Individuals with germline mutation of one of the multiple genes encoding subunits of the Krebs cycle enzyme succinate dehydrogenase
Birt-Hogg-Dube (BHD) syndrome, in which patients can develop cutaneous fibrofolliculomas, lung cysts, spontaneous pneumothoraces, and a variety of renal tumors primarily derived from the distal nephron. . The renal tumors typically include chromophobe RCC, oncocytomas,
Cowden syndrome is one of several syndromes that result from germline mutations of the phosphatase and tensin homolog
(PTEN) tumor suppressor gene, which together are termed PTEN hamartoma tumor syndrome. Individuals with Cowden syndrome carry a 50% lifetime risk of female breast cancer, 34% lifetime risk of RCC, and 10% lifetime risk of epithelial thyroid carcinoma
Major features include AML, cortical tubers, subependymal nodules or subependymal giant cell astrocytomas (SEGA), pulmonary lymphangioleiomyomatosis (LAM), cardiac rhabdomyomas, and facial angiofibromas. Renal AML are typically multifocal, bilateral, and often large, occasionally requiring angioembolization or partial nephrectomy (PN) to treat or prevent bleeding
in ccRCC, the loss of VHL function leads to a state of “pseudohypoxia,” in which the cells respond as if they are being starved for oxygen
ThThe wild-type VHL protein is one component of a complex that targets the hypoxia-inducible factors HIF-1α and HIF-2α for degradation under normoxic conditions.
In hypoxia, or with VHL loss the HIFs are stabilized, enabling dimerization with aryl hydrocarbon receptor nuclear translocator (ARNT) and increased production of vascular endothelial growth factor (VEGF), platelet-derived growth factor (PDGF), and transforming growth factor-α (TGF-α).
These growth factors are involved with angiogenesis, glucose transport, and autocrine and paracrine growth stimulation, respectively.
Therapeutic agents for advanced RCC can either sequester VEGF (bevaciumab), block the receptors for VEGF and PDGF (pazopanib, axitinib, cabozantinib, sunitinib, sorafenib, and levantinib), or target the mTOR pathway (temsirolimus and everolimus) to decrease levels of HIF by inhibiting translation of de novo HIF proteins. The novel therapeutic antagonists PT2399 and PT2385 specifically inhibit the dimerization of HIF-2α and ARNT, resulting in reduced HIF-2α downstream gene expression. (
This is based on Prognostic significance with pathological difference
Chromosome 3 alterations occur in more than 90% of clear cell RCCs, leading to mutation or inactivation of the VHL, or BAP1 genes, which are all present on this portion of the genome
Often responds to targeted molecular therapy and immunotherapy
Almost always positive for cytokeratib 8/18 and 50% positive for vimentin
Most RCCs are round to ovoid and circumscribed by a pseudocapsule of compressed parenchyma and fibrous tissue rather than a true histologic capsule.
Low-power view of typical microscopic appearance of a low-grade clear cell RCC demonstrating a delicate vascular network interspersed within homogeneous nests of cells with clear cytoplasm
Papillary RCC, which was previously designated chromophilic RCC, is the second most common histologic subtype (10%–15%) of all RCCs
Microscopic appearance of type 1 papillary RCC demonstrating basophilic cells with scant cytoplasm and low-grade nuclei. (C) In contrast, type 2 papillary RCC consists of eosinophilic cells with abundant granular cytoplasm and high-grade nuclei.
Type 2 papillary RCC is Worse prognosis then type 1 papillary RCC; similar or worse prognosis when compared with clear cell RCC
Chromophobe RCC (3%–5% of RCC) is typically an indolent type of RCC that shares some histopathologic features with benign oncocytomas.
Most studies suggest a better prognosis for localized chromophobe RCC than for clear cell RCC but a poor outcome in the small subset of patients with sarcomatoid features or metastatic disease
BHD SYNDROME : RCC + Facial fibrofolliculomas , Lung cysts , Spontaneous pneumothorax
Chromophobe renal cell carcinoma (RCC) typically appears as a well-circumscribed, homogeneous, tan tumor OR Light brown .
(B) Chromophobe RCC with admixture of classic (chromophobic) and eosinophilic cells. Characteristic features include distinct cytoplasmic borders, perinuclear “halos,” and nuclear “raisins.” The classic variant is notable for its “plant cell” appearance. (
C) Chromophobe RCC stains positive for Hale colloidal iron and demonstrates multiple microvesicles on electron microscopy
transparent cytoplasm with a fine reticular pattern that has been described as a “plant cell” appearance
Median survival 30 months [65].
On microscopic examination, these tumors consist of an admixture of dilated tubules and papillary structures typically lined by a single layer of cuboidal cells, often creating a cobblestone appearance. The characteristic immunophenotype of these tumors is coexpression of low- and high-molecular-weight cytokeratins and Ulex europaeus agglutinin-1 reactivity (Rumpelt et al., 1991). Positivity for E-cadherin and c-KIT help to distinguish this entity from aggressive papillary RCC, but this staining profile can also be present in urothelial carcinoma, and differential diagnosis often requires careful examination of multiple sections
Renal medullary carcinoma is an uncommon subtype of RCC that occurs almost exclusively in patients with sickle cell trait. It is typically diagnosed in young African-Americans, often in the third decade of life, and many cases are locally advanced and metastatic at the time of diagnosis
This tumor shares many histologic features with collecting duct carcinoma,
Gross : Infiltrative, gray-white with extensive hemorrhage and necrosis
Histology : Poorly differentiated cells with lacelike appearance
site of origin (renal papillae) and association with sickle cell trait suggest that a relatively hypoxic environment may contribute to tumorigenesis.
With the more pervasive use of noninvasive imaging for the evaluation of a variety of nonspecific symptom complexes, more than 60% of RCCs are now detected incidentally
Several studies have shown that such tumors are more likely to be confined to the kidney and a positive impact on survival has been reported, although the contributions of lead and length time biases have not been defined
Symptoms associated with RCC can be due to local tumor growth, hemorrhage, paraneoplastic syndromes, or metastatic disease
Flank pain is usually due to hemorrhage and clot obstruction, although it can also occur with locally advanced or invasive disease.
Hypercalcemia has been reported in up to 13% of patients with RCC and can be due to either paraneoplastic phenomena or osteolytic metastatic involvement of the bone and is also related with parathyroid hormone–like peptides, released from kidney
Polycythemia associated with RCC can be due to increased production of erythropoietin, either directly by the tumor or by the adjacent parenchyma in response to hypoxia induced by tumor growth
Hypertension associated with RCC can be secondary to increased production of renin directly by the tumor; compression or encasement of the renal artery or its branches, effectively leading to renal artery stenosis; or arteriovenous fistula within the tumor.
One of the more fascinating paraneoplastic syndromes associated with RCC is nonmetastatic hepatic dysfunction, or Stauffer syndrome, which has been reported in 3% to 20% of cases
Almost all patients with Stauffer syndrome have an elevated serum alkaline phosphatase level, 67% have elevated prothrombin time or hypoalbuminemia, and 20% to 30% have elevated serum bilirubin or transaminase levels. Other common findings include thrombocytopenia and neutropenia, and typical symptoms include fever and weight loss
Hepatic function normalizes after nephrectomy in 60% to 70% of cases. In general, treatment of paraneoplastic syndromes associated with RCC has required surgical excision or systemic antineoplastic therapy to reduce the burden of disease and, except for hypercalcemia
Now, a more appropriate name for RCC would be the radiologist’s tumor, given the frequency of incidental detection
Radiographic evaluation of a renal mass remains the strongest predictor of malignancy and metastatic potential
RRegardless of imaging modality used, imaging should comment on renal mass diameter in craniocaudal, transverse, and anterioposterior dimensions; tumor morphology, including involvement of or juxtaposition to the renal hilum, vein, or collecting system; enhancement characteristics; and associated features such as retroperitoneal lymphadenopathy and presence or absence of abdominal metastases
INCIDENTAL FINDING IN USG DONE FOROTHER CAUSESS
Ultrasound is the first imaging modality used to evaluate patients with RCC
On ultrasound, RCCs appear as expansile, solitary renal masses and are typical but not diagnostic. They may appear hypoechoic, isoechoic, or hyperechoic in comparison with the renal parenchyma, with heterogeneous echo patterns in larger lesions with internal cystic areas
The tumor pseudocapsule can sometimes be visualized with ultrasound as a hypoechoic halo.
Ultrasound
Simple 2. Non-ionising 3. Good for distinguishing solid, cystic and complex masses
Features of benign cyst:1. Round/oval shape 2, No internal echoes 3. Smooth well-defined wall 4. Acoustic shadow from wall edges only 5. Good US transmission
Colour Doppler appeared to be a useful tool in detecting venous tumour thrombus
Clear cell renal cell carcinoma on conventional ultrasound and contrast-enhanced ultrasound images. (a) Solid renal lesion on conventional ultrasound (calipers). (b) Surrounding peritumoral vessel was observed on the color Doppler flow image (CDFI).
A solid mass is seen on the upper pole of the left kidney. It is mildly hyperechoic to renal parenchyma
Ultrasound may also be useful to find the abnormalities secondary to infiltrating RCCs, including hydronephrosis and vascular encasement with diminished Doppler flow to the area of involvement
Colour Doppler appeared to be a useful tool in detecting venous tumour thrombus though with excellent sensitivity and specificity of 96% and 95% that even exceeded values reached by CECT
Contrast-enhanced ultrasound (CEUS) involves the administration of intravenous contrast agents consisting of microbubbles/nanobubbles of gas.
First-generation ultrasound contrast agents contained microbubbles of air that were dissolved in blood when exposed to acoustic pressure in the ultrasound field. First-generation contrast agents were therefore present in the bloodstream for a limited time
Second-generation contrast agents include microbubbles of perfluorocarbon, nitrogen gas or sulfur hexafluoride stabilized in a phospholipid membrane. The bubbles oscillate when exposed to the ultrasound beam (they are being compressed by the effect of positive pressure created by the ultrasound waves and they expand in the negative pressure phase).
SonoVue is a purely intravascular contrast agent, therefore it allows assessment of the vascularity and non-specific contrast agent retention of lesions. Due to its widespread approval, it is by far the most commonly utilized ultrasound contrast agent currently.
Contrast-enhanced ultrasound has the advantage over contrast-enhanced MRI and CT in patients with contraindications such as renal failure or iodinated contrast allergy. Contrast-enhanced ultrasound also allows for dynamic and repeat examinations.
A. US scan shows one hypo-echo parenchymal lesion (arrow). (b) CEUS scan shows one heterogeneous hyper-enhancement lesion (arrow) in cortical phase.
A dedicated renal mass CT protocol consists of a precontrast, Arterial phase 15-30s Late arterial (portal venous)* 45-60s Nephrographic phase 75-90s
Excretory phase** 180s
Abdominal CT provides information on :
function and morphology of the contralateral kidney
primary tumour extension;
venous involvement;
enlargement of locoregional LNs;
condition of the adrenal glands and other solid organs
Enhancement of greater than 15 to 20 Hounsfield units (HU) is indicative of RCC, although this does not preclude benign histology (Fig. 97.2; Berland et al., 2010). Solid masses that also have substantial areas of negative CT attenuation numbers (below −20 HU) indicative of fat are diagnostic for angiomyolipoma (AML)
CT shows heterogenous lesion arising from the mid pole of kidney with both exophytic and endophytic extension
Tumor complexity may be useful in the selection of nephron-sparing surgery versus RN, surgical approach (open vs. minimally invasive), and assessing for risk of surgical complications
Perioperative aspects and dimension used for anatomical score
The distance between tumor and kidney center (c) consists of tumor radius (r) and nearest distance between tumor margin and kidney center (k). Depth (d) implies the volume of resected renal parenchyma, and CSA was shown to be correlated with resected and ischemic renal volume . In addition, “k” implies the thickness of residual renal parenchyma, and C-index has been shown to be correlated with percent functional volume preservation
mathematical tumor contact surface area (CSA)
A 'trifecta' of outcomes was assessed, with trifecta defined as a warm ischaemia time (WIT) of <20 min, negative surgical margins, and no complications intraoperatively or within 3 months of SURGERY
excluded patients with multiple renal tumors within one kidney, solitary kidneys, or end-stage kidney disease
median (IQR) tumor size was 3.13 (2.4) cm. The median (IQR) R.E.N.A.L., PADUA, C-index, and CSA scores were 7 (3), 8 (2), 2.01 (1.87), and 14.14 (19.25) cm2, respectively
the study examined the applicability of R.E.N.A.L., PADUA, C-index, in predicting ipsilateral renal function after partial nephrectomy using radio-isotope scans.
Regarding the prediction of trifecta outcomes Acar et al. have found that there was no statistically significant difference between RENAL, PADUA, and C-index between the trifecta positive and negative groups.[8] In our series, only C-index was found to have association with trifecta outcomes, and RENAL/PADUA scoring system had no association with trifecta outcomes
Therefore gadolinium-based contrast should generally be used only in patients with an eGFR greater than 30 mL/min/1.73 m2
The single greatest advantage of MRI over ultrasound and CT is that MRI generates the highest intrinsic soft tissue contrast of any cross-sectional imaging modality. MRI can be used to stage renal malignancies and can serve as a guide to appropriate choice of therapy. Renal MRI is particularly useful for patients who should not receive iodine-based CT contrast agents, whether due to history of iodine allergy, renal insufficiency, or renal transplantation. It is also useful in follow-up imaging of patients who have had nephrectomy, partial nephrectomy, or percutaneous tumor ablation.
Contrast-enhanced coronal T1-weighted MRI at the level of the kidneys demonstrates heterogeneous enhancement of the entire right kidney (white arrows)
Coronal subtracted maximum intensity projection (MIP) image of contrast-enhanced magnetic resonance venography (MRV) examination (TR = 3.7 ms, TE = 1.4 ms) demonstrates bland, non-enhancing, nonocclusive thrombus of the inferior vena cava and left common iliac vein (arrows). There is a large right-upper-pole-enhancing RCC (arrowheads)
Unlike for most other malignancies, application of FDG PET/CT is limited for renal cell carcinoma (RCC), mainly due to physiological excretion of 18F-fluoro-2-deoxy-2-d-glucose (FDG) from the kidneys, which decreases contrast between renal lesions and normal tissue, and may obscure or mask the lesions of the kidneys.
Coronal FDG-PET images demonstrate asymmetric uptake of FDG in the right kidney (arrowhead) with enlarged and abnormal uptake in the region of IVC (arrow) suggestive of tumor thrombosis
FDG PET/CT can be effectively used for postoperative surveillance and restaging with high sensitivity, specificity, and accuracy, as early diagnosis of recurrent/metastatic disease can drastically affect therapeutic decision and alter outcome of patients.
FDG PET/CT also has higher sensitivity and accuracy when compared with bone scan to detect RCC metastasis to the bone. FDG PET/CT can play a strong clinical role in the management of recurrent and metastatic RCC
Percutaneous renal tumour biopsy can reveal histology of radiologically indeterminate renal masses and can be considered in patients
who are candidates for AS of small masses.
obtain histology before ablative treatments.
select the most suitable medical and surgical treatment strategy in the setting of metastatic disease.
not indicated for comorbid and frail patients who can be considered only for conservative management (watchful waiting) regardless of biopsy results.
Absolute indications situations in which RN would render the patient anephric or at high risk for ultimate need of dialysis (Russo et al, 2008; Campbell et al, 2009)
Tumor complexity may be useful in the selection of nephron-sparing surgery versus RN, surgical approach (open vs. minimally invasive), and assessing for risk of surgical complications
it beyond 30 minutes, the recovery of renal function is either incomplete or absent
It affects mostly the proximal tubular cells, whereas the glomeruli and blood vessels are generally spared
The solitary kidney is more resistant to ischemic damage than the paired kidney.
These factors ensure optimal perfusion with an absence of cortical vasospasm at the time of arterial occlusion, which allows uniform restoration of blood flow throughout the kidney when the renal artery is unclamped
Intervention: Patients undergoing NSS were randomized to receive mannitol (12.5g) or placebo intravenously within 30min prior to renal vascular clamping
Ice-slush cooling
The mobilized kidney is surrounded with a rubber sheet on which sterile ice slush is placed to completely immerse the kidney
Core renal temperature of 20.c takes at least 15 minutes to achieve if kidney is packed with ice slush.
Extent up to 2- 4 hrs without ischemic injury
A Kidney bar can be employed if necessary.
To preserve stability and prevent forward roll, the dependent leg is flexed at the hip and knee and the top leg is kept straight.
A pillow is placed between the knees.
An axillary roll is deployed just caudal to the axilla to prevent com-pression or injury of the axillary neurovascular bundle.
Other pressure points, including the upper foot, are padded with foam.
The nondependent arm should be placed on a padded Mayo stand so that the arm is horizontal with slight forward rotation at the shoulder.
The bed is flexed until the flank muscles are under stretch. The bed is placed in Trendelenburg position so that the flank is rendered
parallel to the floor.
The patient is secured to the mobile part of the operating table with 2-inch-wide adhesive tape, which fixes the patient in place while allowing adjustment of flexion.
After sterile preparation and draping, the skin incision begins at the costovertebral angle, approximately at the lateral border of the sacrospinalis muscle just inferior to the 12th rib.
The incision is made a fingerbreadth below and parallel to the 12th rib and is carried onto the anterior abdominal wall.
In an attempt to avoid the subcostal nerve, the incision can be curved gently downward at the midaxillary line.
The incision is carried sharply through the subcutaneous tissue, exposing the fascia of the latissimus dorsi and external oblique muscles.
Electrocautery is used to incise the muscles in the line of the incision, starting with the latissimus dorsi posteriorly .
The posterior inferior serratus muscles, which insert into the lower four ribs, are also encountered in the posterior portion of the wound and transected.
In the anterior aspect of the wound the external oblique muscle is divided. These maneuvers expose the fused lumbodorsal fascia, which gives rise to the internal oblique and transversus abdominis muscles.
The lumbodorsal fascia and internal oblique muscle are divided . By using two fingers inserted into an opening created in the lumbodorsal fascia at the tip of the 12th rib, the peritoneum is swept medially as the transversus abdominis is split digitally.
The subcostal nerve should be identified between the internal oblique and transversus abdominis muscles and spared
A:The renal capsule is circumferentially incised 5 to 10 mm peripheral to the tumor with electrocautery.
B: A combination of blunt and sharp dissection with Metzenbaum scissors is used to excise the tumor with a small rim of normal parenchyma.
C: Bleeding vessels are controlled and the collecting system is closed.
D: The defect is reconstructed using Nu-Knit bolsters and pledgets.
Hyperfiltration injury is most common when the total nephron mass of both kidneys is reduced by more than 80%
Partial nephrectomy (PN) is the reference standard of management for a cT1a renal mass. However, its role in the management of larger tumors (cT1b and cT2) is still under scrutiny.
21 case-control studies including 11204 patients (RN 8620; PN 2584) were deemed eligible and included in the analysis
Hyperfiltration injury is most common when the total nephron mass of both kidneys is reduced by more than 80%
Multiple retrospective studies have suggested a possible benefit to regional lymphadenectomy for carefully selected patients
Regional lymphadenectomy extending from the crus of the diaphragm to the aortic bifurcation is employed in select cases of advanced local disease and when technically feasible.
Regional lymphadenectomy extending from the crus of the diaphragm to the aortic bifurcation is employed in select cases of advanced local disease and when technically feasible.
One of the unique features of RCC is its frequent pattern of growth intraluminally into the renal venous circulation, also known as venous tumor thrombus. This growth may extend into the IVC with cephalad migration as far as the right atrium or beyond. The absence of metastases in many patients with vena cava extension is an intriguing aspect of this cancer’s behavior
In children, Wilms tumor, clear cell sarcoma of the kidney, adrenocortical carcinoma, and neuroblastoma can all be associated with IVC thrombi. In adults, urothelial carcinoma of the renal pelvis, lymphoma, retroperitoneal sarcoma, adrenocortical carcinoma, pheochromocytoma, and angiomyolipoma are all potential sources of an IVC thrombus
Usually, IVC thrombectomy is accompanied by radical nephrectomy and regional lymph node dissection.
Patients with renal tumors are at increased risk for pulmonary embolism as a result of malignancy-associated hypercoagulability and venous thrombus embolization.
Angiographic infarction of the blood supply to the tumor thrombus can help shrink a large thrombus to a more manageable size, potentially avoiding the need for bypass or extensive mobilization of the liver. Angioembolization can be considered when caval thrombi appear to invade the IVC, when the thrombus invades the intrahepatic or suprahepatic veins and cannot be excised,
Level I: The tumor thrombus is either at the entry of the renal vein or within the IVC < 2 cm from the confluence of the renal vein and the IVC.
Level I IVC thrombus managed with a Satinsky clamp to achieve vascular isolation.
Level II: The thrombus extends within the IVC > 2 cm above the confluence of the renal vein and the IVC but still remains below the hepatic veins.
Level II IVC thrombus managed by sequential clamping of the
For right side lower IVC, contralateral renal vein, and cephalad IVC, along with mobilization of the IVC and occlusion of lumbar veins, allowing for vascular isolation
For left side Vascular control is obtained sequentially in the following order: (1) the ipsilateral (left) renal artery is ligated, (2) the infrarenal IVC is clamped, (3) the contralateral (right) renal vein is clamped, (4) the suprarenal IVC is clamped,
Level III: The thrombus involves the intrahepatic IVC. The size of the thrombus ranges from a narrow tail that extends into the IVC to one that fills the lumen and enlarges the IVC.
Level III IVC thrombus managed by mobilization of the liver, providing exposure of the intrahepatic IVC and retraction of the thrombus to facilitate placement of the upper IVC clamp just below the level of the hepatic veins. Through this approach vascular isolation is achieved in a manner similar to that in B. If the cephalad clamp must be placed above the level of the hepatic veins, a Pringle maneuver should be performed to temporarily occlude the hepatic blood flow
Level IV: The thrombus extends above the diaphragm or into the right atrium
Clamping the suprahepatic IVC results in a 60% reduction in cardiac preload, an 80% increase in peripheral vascular resistance, a 50% increase in heart rate, a 40% drop in cardiac output, and a 10% to 20% drop in mean arterial blood pressure. If the cardiac output drops more than 50% or the mean arterial blood pressure drops more than 30%, the patient will not tolerate suprahepatic IVC clamping. Options for managing this situation include bypass and clamping of the supraceliac aorta.
Sequencial clamping
Hyperfiltration injury is most common when the total nephron mass of both kidneys is reduced by more than 80%