Neoadjuvant Treatment (NAT) is indicated in locally advanced tumors and improves the results of subsequent surgery. In borderline tumors, the place of this preoperative treatment is more controversial, probably because borderline tumors are a heterogeneous group. We focused on the tumors with venous involvement without any arterial involvement and studied the results of neoadjuvant treatment in this particular group
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...daranisaha
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...JohnJulie1
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...eshaasini
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...semualkaira
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...NainaAnon
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Clinics of Oncology | Oncology Journals | Open Access JournalEditorSara
Clinics of OncologyTM (ISSN 2640-1037) - Impact Factor 1.920* is a medical specialty that focuses on the use of operative techniques to investigate and resolve certain medical conditions caused by disease or traumatic injury.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...daranisaha
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...JohnJulie1
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...eshaasini
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...semualkaira
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...NainaAnon
Upper rectal cancer management is controversial. The present series reports the outcomes of treatment comparing neoadjuvant chemoradiation (NCRT) versus upfront surgery.
Clinics of Oncology | Oncology Journals | Open Access JournalEditorSara
Clinics of OncologyTM (ISSN 2640-1037) - Impact Factor 1.920* is a medical specialty that focuses on the use of operative techniques to investigate and resolve certain medical conditions caused by disease or traumatic injury.
Upper Rectal Cancer: Benefit After Preoperative Chemoradiation Versus Upfront...semualkaira
In this retrospective study we enrolled patients with upper rectal or sigmoid junction locally advanced tumors (stages II-III). At the first Institution patients received NCRT followed by surgery (study group); at the second Institution patients were referred to upfront surgery (control group). Overall survival was the main endpoint of the analysis. Local relapse and other clinical variables were also analyzed.
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Leiomyosarcoma (LMS) metastasis in the central nervous system is extremely rare. Metastatic LMSs have been described in the orbit, meninges, and skull base, however there are no reports of LMS metastasis into the cavernous sinuswith primary origin from lower extremity and long silent disease period of 7 years..
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Colorectal or bowel cancer is one of the major cause of cancer worldwide. Research has shown that 15 to 20 % colorectal cancer patients are also diagnosed with synchronous liver metastases (LM) at presentation and about one third eventually develop liver lesions (Leporrier, Maurel, Chiche, Bara, Segol, and Launoy, 2006; Manfredi, Lepage, Hatem, Coatmeur, Faivre, and Bou-vier, 2006)...
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Acute promyelocytic leukemia(APL),a specific characteristic of t(15;17) chromosomal translocation,molecular gene analyses are conclusive in vivo evidence that oncogenic pml/RARa fusion plays a crucial role in APL leukemogenesis [1-3]. Since the introduction of initial 13-cis retinoic acid(13-cis RA)[4],and currently all-trans RA(ATRA) [5] and tamibarotene [6],RA plus chemotherapy or RA plus As2O3 regimen is currently the standard of care [7]...
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mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
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disorder called alcohol use disorder (AUD), with mild, moderate,
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- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
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micro teaching on communication m.sc nursing.pdfAnurag Sharma
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Prix Galien International 2024 Forum ProgramLevi Shapiro
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- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
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These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
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
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
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
2. Complete surgical resection is the only curative treatment; howev-
er, R0 resection rates are still low (10-22%) [4, 5]. Many studies
reported that adjuvant therapy after pancreatic surgery increased
patient survival [6-8]. This adjuvant therapy has to be initiated as
soon as possible [9], but may be delayed or even cancelled be-
cause of surgical complication and delayed recovery [10]. NAT
on the contrary is always feasible and moreover, a lot of studies
demonstrated that it increases the resection rate [11-15]. In partic-
ular, neoadjuvant chemo-radiotherapy can increased resection rate
and R0 resection rates with a better median survival [12, 15, 16].
Today, pancreatic cancer 5-year survival rate have risen to a record
high, 7.9%, in the UK [17].
Non metastatic pancreatic tumors are often divided in 3 groups:
potentially resectable, borderline resectable and locally advanced
[18]. NAT is undisputable for locally advanced tumors [19-23],
and increased R0 resection rates for borderline tumors [19, 24,
25]. But the question remains open for tu-mors with isolated ve-
nous involvement. Indeed, tumors with venous contact are either
resectable (if contact <180°) or borderline (if involvement ≥180°)
and neoadjuvant treatment is not a paradigm for resectable tumors,
especially because venous resection is safe. In fact, surgical mor-
tality is not in-creased with venous resection and is not predictive
of disease-free or overall survival [26, 27]. Howev-er, recent study
seems to suggest favorable oncologic benefits for this kind of tu-
mors [28].
In this retrospective observational study, we focused on patients
with isolated venous involvement or abutment who had Whipple
procedure following NAT.
3. Methods
For this observational retrospective study, we included all patients
who underwent a Whipple procedure in our center (Bordeaux Uni-
versity Hospital, Department of digestive surgery) for Pancreatic
Adenocarcinoma (PA) from January 2004 to December 2016. A
total of 287 patients had a Whipple procedure for PA. 169 had
surgery first, 112 had a neoadjuvant treatment.
Preoperative contrast-enhanced Computerized Tomography (CT)
or Magnetic Resonance Imaging (MRI) was performed for all the
patients allowing a precise staging.
In order to specify the vascular contacts of the tumor, we used a
local classification of vascular involvement. All tumors were clas-
sified 0 (no involvement), 1 (abutment or involvement between 0
and 180°) or 2 (involvement >180° or vascular stenosis), for su-
perior mesenteric vein or portal vein (MV), superior Mesenteric
Artery (MA), Hepatic Artery (HA) and coeliac artery (C). Every
patient was classified MV x, MA x, HA x and C x, depending on
diagnostic CT-scan.
We included all patients who had just on CT-scanner or MRI, a
venous involvement, i.e., MV 1 or 2, MA 0, HA 0, C 0. All patients
who had no pancreatic ductal adenocarcinoma on histologic analy-
sis were excluded from our study.
We divided patients in two groups:
- NA group for patients who had surgery following neoad-
juvant treatment
- R group for patients who had surgery without neoadju-
vant treatment, i.e. our control group
Every decision of NAT or first-line resection were decided in mul-
tidisciplinary meeting, depending on ongoing clinical trials, trials
result and medical experience.
Eighty-five patients had a venous abutment or involvement (MV1
or MV2) without any arterial abutment (MA0, HA0, and C0). Pa-
thology exam was not possible for one surgical specimen because
of a bad formalin fixation. The patient was excluded from the
study. 50 (59.5%) had surgery after NAT (NA group, n= 50), 34
(40.5%) had surgery first (R group, n =34).
NAT consisted in exclusive chemotherapy (CT) for 9 patients, or
an association of radiotherapy and chemotherapy (RCT) for 41 pa-
tients, protocols of chemotherapy were FOLFIRINOX [25], gem-
citabine-based CT [13], Cisplatin LV5 FU2 (4). For patients who
had radiotherapy (41/50), radiation doses were applied with daily
fractions of 1.8 Gy, 5 days a week, for a total of 45, 50,5 or 59 Gy.
Four weeks after completion of first and second rounds of neoad-
juvant treatment, CT-scan was con-ducted.
Pancreaticoduodenectomies were conducted with en-bloc re-
section. During procedure, vascular resection was decided by sur-
geon, with regards to the adhesion between pancreatic tumor and
the vein. Tangential or segmental vein resections were conducted
according to the importance of the adherence and the feasibility of
reconstruction in-order to achieve R0 resection.
Neoadjuvant treatment, when performed (17 (34%) in NA-group,
24 (70.96%) in R-group), was FOLFOX (or FOLFIRINOX) or
gemcitabine-based CT.
Statistical analyses were performed using Prism 6® software pro-
gram for Mac OS.
Minimal follow-up was 12 months. Overall survival was calcu-
lated from the time of surgery to death or the last follow-up day.
Disease-free survival was calculated from the time of surgery to
recur-rence diagnosis or last follow-up day. Overall survival from
diagnosis was calculated from the time of diagnosis to death or
last-follow-up day. Disease-free survival was calculated from
the time of diag-nostic to recurrence diagnostic or last follow-up
day. Survival time was analyzed using Kaplan-Meier method.
Differences in survival were compared using log-rank test. Pa-
tient’s characteristics, periopera-tive outcomes and pathological
results among the 2 groups were compared with non-parametrical
Mann-Whitney test for continuous variable and Fischer test for
categorical variables. Repeated measures data between same pa-
clinicsofoncology.com 2
Volume 5 Issue 5 -2021 Research Article
3. tients were compared with Wilcoxon matched-pairs signed rank
test. P-value < 0.05 was considered statistically significant.
Primary endpoint was disease-free survival.
Secondary endpoints were overall survival, complete resection ra-
tio, positive nodes ratio, and tu-mor size.
4. Results
Forty-three patients were male, 41 were female. Median age was
65.7 (59.2-71) years. Thirty-four patients belong to R group, 50
patients to NA group. Patients were older in the R group (68.9
years) than in the NA group (62.2). At diagnosis tumors were big-
ger in NA group (median = 30 mm) than in R group (median = 25
mm). Tumor characteristics were similar except for uncus tumors,
more fre-quents in NA group (18% vs 2.9%). Venous involvement
>180° were more important in the NA group (46% vs 17.6%).
Table 1: Demographic and tumor characteristics of 84 patients with venous involvement
NA group (n=50) R group (n=34) Total (n=84) p
Age (years) (median) 62.8 (54.2-68.4) 68.9 (57.1-71.3) 65.7 (59.25-71) 0.009
Male 28 (56%) 15 (44.1%) 43 (51.2%) ns
Tobacco use 16 (32%) 6 (17.6%) 22 (26.2%) ns
- PA (median) 20 (15-30) 17.5 (11.25-23.75) 20 (10-30)
ASA (median) 2 (1-2) 2 (2-2) 2 (2-2) ns
Weight loss (kg) (median) 5 (0-8) 5 (0-7.75) 4.75 (0-8) ns
BMI (kg/m²) (median) 23.4 (21.1-25.5) 23.2 (21.5-24.6) 23.3 (21.1-25.4) ns
Tumor size (mm) (median) 30 (25-38) 25 (22-30) 30 (23-34.3) 0,01
Tumor site
- Head 39 (78%) 32 (94.1%) 71 (84.5%)
- Uncus 9 (18%) 1 (2.9%) 10 (11.9%)
- Isthmus 2 (4%) 1 (2.9%) 3 (3.6%) ns
Dilatation
- bile duct system 36 (72%) 26 (76.5%) 62 (73.8%) ns
- pancreatic duct 36 (72%) 26 (76.5%) 59 (70.2%) ns
Lymph nodes 19 (38%) 11 (32.35%) 30 (35.7%) ns
MV1 27 (54%) 28 (82.4%) 55 (65.5%) 0.01
MV2 23 (46%) 6 (17.6%) 29 (34.5%) 0.01
Median time from diagnostic to surgery was 1.07 month in R group
and 8.38 month in the NA group. Median operating time was lon-
ger in NA group (318 min) than in R group (260 min). Venous
resection frequency was similar in the two groups. Kind, severity
and frequency of complications were similar in the 2 groups, in
particular pancreatic fistula (20.6 % in R group vs 19.6 % in NA
group). 3 patients had grade C fistula, 1 in NA group, 2 in R group.
In postoperative time, 1 patient died in NA group from hemor-
rhage, no patients in R group.
Table 2: Operative characteristics and post-operative time of the 84 patients
NA group (n=50) R group (n=34) p
Time from diagnostic to surgery (month) (median) 8.47 (7.54-9.56) 1.07 (0.69-2.34) 0.0001001
Operating time (min) (median) 318 (258-403) 260 (227-325) 0.024
Venous resection 25 (50%) 15 (44.1%) ns
Arterial resection 1 (2%) 0 ns
Pancreatic duct size (mm) (median) 5 (3-7) 5 (3-6) ns
Anastomosis
- pancreaticojejunostomy 28 (56%) 17 (50%) ns
- pancreaticogastrostomy 17 (34%) 16 (47.1%) ns
- wirsungostomy 2 (4%) 0 ns
- total pancreatectomy 3 (6%) 1 (2.9%) ns
Length of hospital stay (median) 15 (13-20.5) 17 (13-21) ns
DINDO
- I 17 (34%) 10 (29.4%) ns
- II 25 (50%) 15 (44.1%) ns
- IIIa 1 (2%) 2 (5.9%) ns
- IIIb 2 (4%) 1 (2.9%) ns
- IVa 1 (2%) 1 (2.9%) ns
- IVb 0 0 ns
- V 1 (2%) 0 ns
Complications
- Pancreatic fistula 9 (18%) 7 (20.6%) ns
- Delay gastric emptying 6 (12%) 4 (11.8%) ns
- Hemorrhage 2 (4%) 1 (2.9%) ns
- Other 5 (10%) 3 (8.8%) ns
Rehospitalization 6 (12%) 5 (14.7%) ns
clinicsofoncology.com 3
Volume 5 Issue 5 -2021 Research Article
4. There were no pT4. There were more pT3 in the R group (91.1%)
than in the NA group (68%). Tumor size was not significantly big-
ger in the R group (p=0.058). Tumoral nodes were more frequent
in R group (73.5%) than in the NA group (46%).
For R group, median tumor size was 25 mm (22-30) at diagnostic
CT-scan and 28.5 mm (22.25-30.5) at pathological exam (p=0.77).
For NA group, median tumor size was 30 mm (25-38) and 23 mm
(18-30) at pathological exam (p=0.0009).
Adjuvant treatment was more frequent in R group (n=24, 70.6%)
than in NA group (n=17, 32.7%).
Follow-up was at least 12 months. 1 patient was lost of follow-up
after 23.7 months because he moved in another country.
Median disease-free survival after surgery was 20.6 months for
NA group vs 13.6 months in R group. Median overall survival af-
ter surgery was 35.2 months in NA group vs 22.3 in R group. Dif-
fer-ences were not significant with log-rank test.
Median disease-free survival from diagnostic was 31 months for
NA group vs 16.7 months in R group (p=0.025). Median overall
survival from diagnostic was 44.6 months for NA group vs 24.9
month in R group (p=0.11).
Because neoadjuvant treatment was different, we made comple-
mentary analysis. Median disease-free survival was 54.4 month
for patients from NA group who had FOLFIRINOX or FOLFOX
vs 10 months for other patients (p=0.09). Median overall survival
was 54.4 months for patients from NA group who had FOLFIRI-
NOX or FOLFOX vs 26.6 months for others patients.
Table 3: Pathological results for 84 patients
NA group (n=50) R group (n=34) p
Median tumor size (mm) 23 (18-30) 28.5 (22.25-30.5) 0.058
TNM
- T0 6 (12%) 0 (0%) 0.08
T1 6 (12%) 1 (2.9%)
T2 4 (8%) 2 (5.9%)
T3 34 (68%) 31 (91.1%) 0.016
- N+ 23 (46%) 25 (73.5%) 0.01
- M+ 1 (2%) 1 (2.9%) ns
Tumoral nodes ratio (median) 0 (0-7.9) 7(0.7-21.7) 0.009
Différenciation
- well 12 (24%) 8 (23.5%) ns
- moderate 25 (50%) 20 (58.8%) ns
- poor 0 (0%) 3 (8.8%) ns
- other 3 (6%) 1 (2.9%) ns
Lymphovascular invasion 19 (38%) 19 (55.9%) ns
Perineural invasion 29 (58 %) 27 (79.4%) 0.059
Complete resection (R0) 43 (86%) 25 (73.5%) ns
Table 4: Survival and recurrence of 85 patients
NA group (n=50) R group (n=34) p
Adjuvant treatment 17 (34%) 24 (70.6%) 0.0008
One year survival 0.78 0.824
Two years suvival 0.608 0.385
Five year survival 0.315 0.292
Median overall survival (month) 35.2 22.3 ns
Recurrence 28 (56%) 24 (70.6%) ns
- local 3 4 ns
- nodes 0 0 ns
- lever 6 7 ns
- peritoneal 8 1 0.02
- lung 3 3 ns
- other 0 0 ns
- diffuse 4 6 ns
Median disease-free survival (month) 20.6 13.6 ns
clinicsofoncology.com 4
Volume 5 Issue 5 -2021 Research Article
5. Figure 1: Tumor size at diagnostic (CT-scan) and after surgery (at patho-
logical exam)
Figure 2: Disease-free and overall survivals
5. Discussion
In pancreatic head adenocarcinoma, vascular and in particular ve-
nous abutment or involvement is a key point of resectability and
the classifications are partially based on it
- Classifications from NCCN and MDACC in resectable/
borderline/ locally advanced are un-clear. According to
NCCN, venous abutment without artery abutment can
be either resectable (if <180° without vein contour irreg-
ularity), either borderline resectable [29]. According to
MDACC (University of Texas D Anderson Cancer Cen-
ter), venous involvement without oc-clusion is potential-
ly resectable [16, 30].
- From oncological point of view, the question about neo-
adjuvant treatment has not been solved yet, especially in
resectable tumors but also for borderline tumors. Homog-
enous group of pa-tients are difficult to obtain because of
unclear classification (Groups of borderline patients can
include patients with just venous involvement but arteri-
al abutment too, venous abutment or involvement can be
classified in two kind of group, depending of the classifi-
cation choice made by medical staff). This question about
classification increases the difficulty to interpret studies
and metanalyses about neoadjuvant treatment [31, 32].
- From a technical point of view, contrary to arterial resec-
tion [33-35], venous resection is con-sidered as safe and
useful to achieve complete resection [34, 36, 37]. Lots of
questions are still open: is it necessary to do systematic
resection [32]? Which kind of resection (lateral, resec-
tion, end-to-end anastomosis) is the best [32, 33]?
In our center, every patient’s treatment is discussed weekly in mul-
tidisciplinary meeting with on-cologists, gastroenterologists, ra-
diologists and specialized digestive surgeons. Tumors and vascu-
lar abutment were analyzed for each patient with our simple clas-
sification MVx, MAx, HAx and Cx and classified in resectable/
borderline/locally advanced. NAT or not were decided depending
on several studies protocols or depending on subjective criteria
when no studies protocols were on progress. NAT has been criti-
cized as a loss of chance because some patients progressed in the
meantime and did not reach surgery. We believe that one interest
of NAT is the selection of patients allowing the exclusion of pro-
gressive patients with aggressive tumors which anyway wouldn’t
be good candidates to surgery.
That’s why in our center, the frequency of NAT was high in the
group of patients with only ve-nous involment or abutment. As
a matter of fact, the decision in our multidisciplinary staff was to
per-form the NAT when the tumor seemed aggressive (size, CA19
9). We are aware that the characteristics of the patients from NA
group and R group are different: tumors were bigger and median
age lower. A case-control study would have been preferable but it
was impossible considering the size of the groups.
Moreover, our long-term results need to be examined with pre-
caution because it is not an inten-tion-to-treat study. The period
between diagnostic and surgery is significantly longer in NA group
be-cause of the pre-operative treatment (8.47m vs 1.07m). We de-
cide to calculate survival after surgery and not after diagnostic to
avoid a bias.
Median disease-free survival after pancreaticoduodenectomy was
20.6 month in NA group versus 13.6 months in R group. Log-
rank test has found no significant difference between the 2 groups.
About overall-survival, we didn’t find some significant differences
either: median survival was 35.2 months in NA-group and 22.3
months in R-group. It is interesting to note that’s the survival in
the NAT group, encompassing patients with more advanced tu-
mors, was slightly better than in the front line surgery group, even
the statistical difference was not reached, probably because of the
small size of the groups.
Recent meta-analysis about resectable and borderline resectable
pancreatic adenocarcinoma found lower median survival after re-
section (26.1m vs 15.0m) [31] probably because of heterogeneity
in vascular involvement and neoadjuvant treatment. Some recent
study suggests the interest of neoadju-vant treatment for tumors
with venous contact only [28]. But considering our primary end-
point we are not able to demonstrate that NAT is beneficial in term
clinicsofoncology.com 5
Volume 5 Issue 5 -2021 Research Article
6. of survival.
Nevertheless, efficiency of NAT on pancreatic adenocarcinoma is
confirmed in our study:
- Wilcoxon matched-pairs signed rank test found a signif-
icant difference in group NA between tumor size before
and after neoadjuvant treatment. This result confirms effi-
cacy of neoadju-vant treatment on downsizing for tumors
with only venous involvement.
- Concerning downstaging, 6 patients (12%) in NA group
were T0 on pathological analyze. T3 tumors in NA group
was less frequent than in R group (68 % vs 91.1%,
p=0.016). Positive lymph nodes were more frequent in
R group than in NA group (26.5 % vs 54%) with tumoral
nodes ratio significantly different. These data are con-
firmed by other studies [31, 32].
Complete resection was similar in the two groups, 86% in NA
group, 73,5% in R group, despite bigger tumors and more venous
involment on CT-scan in NA group. This result is in favor of neo-
adju-vant treatment. In fact, we know than complete resection is a
good-prognosis criterion [38-40].
NAT does not influence the postoperative course even if surgery
was longer in NA group than in R group. Recent meta-analysis
confirms longer procedure after neoadjuvant therapy but it in-
cludes local-ly advanced tumors or borderline tumors with arterial
involvement [41]. In our series, the prolonged time was mostly
due to difficulties in dissection after radiotherapy. Interestingly
venous involvement doesn’t seem to explain differences for oper-
ative length because venous resection was as frequent in R group
(44.1%) as in NA group (50%).
Concerning post-operative period, complications were similar in
term of frequency, kind or severi-ty. and similar than in other stud-
ies [42]. Median length of stay in the hospital is logically not dif-
ferent for the two groups. Unlike some studies, we didn't find less
pancreatic fistula in NA group (18%) vs in R group (20.6%) [41].
In NA group, only 34% of patients had adjuvant therapy, but log-
ically 100% of them had systemic treatment before surgery. In R
group, 10 patients (29.4%) had no adjuvant therapy after resection
because of delayed recovery, less than in other studies [10, 43].
We know that adjuvant therapy must not be delayed to increase
survival after resection [6, 9], which can be a challenge be-cause
of the morbidity in pancreatocoduodenectomies. That’s why neo-
adjuvant treatment is a better chance for patients to receive a com-
plete treatment (local and systemic). A recent study suggests that
the addition of AT after NT is beneficial for patients with low-risk
pathology. Today adjuvant treat-ment after NAT should be recon-
sidered, especially for patient with good response [44].
About neoadjuvant and adjuvant treatment, protocols evolved
with time. Before FOLFIRINOX, other treatments (5-FU, Gemcit-
abine) were the reference. With FOLFIRINOX, disease-free sur-
vival seemed to be better in our study but we need more follow-up
time to confirm it. This chemotherapy is relatively new in neoad-
juvant treatment. It already proves its interest for locally advanced
pancreatic cancer [19, 20, 24, 45] and for metastatic pancreatic
cancer [46] despite lower quality of life [47]. Some new results in
neoadjuvant treatment for borderline tumors are interesting [48,
49] but we still need more studies. Moreover, in the similar study
of Lee et al., neoadjuvant treatment was based on Gemcitabine
[28]. Literature reports better results for FOLFIRINOX compared
to gemcitabine or cape-citabine in neoadjuvant treatment for local-
ly advanced tumors [50]. Today it should be interesting to consider
FOLFIRINOX in neoadjuvant for tumors with venous involment
alone. Gemcitabine/Nab-Paclitaxel may be a good option for neo-
adjuvant therapy too [51, 52].
In conclusion, pancreaticoduodenectomy after neoadjuvant for ad-
enocarcinoma with venous involvement only is as safe as up-front
surgery. It provides good results in term of downsizing (smaller
tumors) and down staging (more T0, T1 and T2, less N+)., De-
spite bigger tumors with worse venous involvement, frequency of
complete resection is the same after neoadjuvant treatment than
without. De-spite longer surgery, frequency of post-operative
complications is the same. Despite worst prognosis tumors, long-
term survival and disease-free survival are comparable. Despite
post-operative complications or longer recovery, every patient op-
erated after neoadjuvant treatment had complete treatment.
This study confirms that neoadjuvant treatment can be an option
for selected patients with only venous involvement. But insuffi-
cient number of patient, retrospective character and differences in
neoadjuvant protocols are major disadvantages that we share with
other studies. That’s why multicenter series and meta-analyses
would be interesting to study the benefit of NAT in this particular
group. In order to eliminate the biais, a randomized trial, even dif-
ficult to construct, would be indeed the best option.
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