IMPORTANCE The recently released eighth edition of the American Joint Committee on Cancer TNM staging system for pancreatic cancer seeks to improve prognostic accuracy but lacks international validation. OBJECTIVE To validate the eighth edition of the American Joint Committee on Cancer TNM staging system in an international cohort of patients with resected pancreatic ductal adenocarcinoma. DESIGN, SETTING, AND PARTICIPANTS This international multicenter cohort study took place in 5 tertiary centers in Europe and the United States from 2000 to 2015. Patients who underwent pancreatoduodenectomy for nonmetastatic pancreatic ductal adenocarcinoma were eligible. Data analysis took place from December 2017 to April 2018. EXPOSURES Patients were retrospectively staged according to the seventh and eighth editions of the TNM staging system. MAIN OUTCOMES AND MEASURES Prognostic accuracy on survival rates, assessed by Kaplan-Meier and multivariate Cox proportional hazards analyses and concordance statistics. RESULTS A total of 1525 consecutive patients were included (median [IQR] age, 66 (58-72) years; 802 (52.6%) male). Distribution among stages via the seventh edition was stage IA in 41 patients (2.7%), stage IB in 42 (2.8%), stage IIA in 200 (13.1%), stage IIB in 1229 (80.6%), and stage III in 12 (0.8%); this changed with use of the eighth edition to stage IA in 118 patients (7.7%), stage IB in 144 (9.4%), stage IIA in 22 (1.4%), stage IIB in 643 (42.2%), and stage III in 598 (39.2%). With the eighth edition, 774 patients (50.8%) migrated to a different stage; 183 (12.0%) were reclassified to a lower stage and 591 (38.8%) to a higher stage. Median overall survival for the entire cohort was 24.4 months (95% CI, 23.4-26.2 months). On Kaplan-Meier analysis, 5-year survival rates changed from 38.2% for patients in stage IA, 34.7% in IB, 35.3% in IIA, 16.5% in IIB, and 0% in stage III (log-rank P < .001) via classification with the seventh edition to 39.2% for patients in stage IA, 33.9% in IB, 27.6% in IIA, 21.0% in IIB, and 10.8% in stage III (log-rank P < .001) with the eighth edition. For patients who were node negative, the T stage was not associated with prognostication of survival in either edition. In the eighth edition, the N stage was associated with 5-year survival rates of 35.6% in N0, 20.8% in N1, and 10.9% in N2 (log-rank P < .001). The C statistic improved from 0.55 (95% CI, 0.53-0.57) for the seventh edition to 0.57 (95% CI, 0.55-0.60) for the eighth edition. CONCLUSIONS AND RELEVANCE The eighth edition of the TNM staging system demonstrated a more equal distribution among stages and a modestly increased prognostic accuracy in patients with resected pancreatic ductal adenocarcinoma compared with the seventh edition. The revised T stage remains poorly associated with survival, whereas the revised N stage is highly prognostic.

IMPORTANCE The benefit of adjuvant chemotherapy after resection of pancreatic cancer following neoadjuvant combination treatment with folinic acid, fluorouracil, irinotecan, and oxaliplatin (FOLFIRINOX) is unclear.OBJECTIVE To assess the association of adjuvant chemotherapy with overall survival (OS) in patients after pancreatic cancer resection and neoadjuvant FOLFIRINOX treatment.

Methods: We retrospectively reviewed the basis on which the diagnosis of cancer was established between 2004 and 2015 in the IKZ region. We identified all patients of whom the diagnosis was establish prior to or during surgery and those who were diagnosed post-operative. With that information we expected to discover that the macroscopic examination in the operating room, by the surgeon, suffices in a great number of cases. Results: Histological gallbladder examination occurred in 31902 patients and malignancy was diagnosed in 205 cases, 96 were found inoperable due to metastatic disease. In 34, the diagnosis or high suspicion was already made before the operation. In another 30 we found description of a tumour in the operation report. In just 38 there was no mention of a suspicious gallbladder appearance. Upon macroscopic examination in the pathology laboratories, abnormalities were seen in 23 of the 38. In the remaining 15, it was documented that the specimens were taken at random. Of these 15 cases, 8 were either acute cholecystitis, conversion or open procedure which would problably vanguard additional histopathologic inspection. Resulting in unexpected gallbladder malignancy in just 7 cases. Of these cases only 1 was referred for additional surgery. Conclusions: We presented one of the largest single study cohort of gallbladder cancer and histopathologic gallbladder specimens. The major part of the invasive gallbladder cancers showed macroscopic abnormalities perioperative. Therefore Sel-HP seems a feasible policy and would reduce costs and pathological workload.

for the Dutch Pancreatic Cancer Group Background: Textbook outcome (TO) is a multidimensional measure for quality assurance, reflecting the ''ideal'' surgical outcome. Methods: Post-hoc analysis of patients who underwent pancreatoduodenectomy (PD) or distal pancreatectomy (DP) for all indications between 2014 and 2017, queried from the nationwide prospective Dutch Pancreatic Cancer Audit. An international survey was conducted among 24 experts from 10 countries to reach consensus on the requirements for TO in pancreatic surgery. Univariable and multivariable logistic regression was performed to identify TO predictors. Between-hospital variation in TO rates was compared using observed-versus-expected rates. Results: Based on the survey (92% response rate), TO was defined by the absence of postoperative pancreatic fistula, bile leak, postpancreatectomy hemorrhage (all ISGPS grade B/C), severe complications (Clavien-Dindo !III), readmission, and in-hospital mortality. Overall, 3341 patients were included (2633 (79%) PD and 708 (21%) DP) of whom 60.3% achieved TO; 58.3% for PD and 67.4% for DP. On multivariable analysis, ASA class 3 predicted a worse TO rate after PD (ASA 3 OR 0.59 [0.44-0.80]), whereas a dilated pancreatic duct (>3 mm) and pancreatic ductal adenocarcinoma (PDAC) were associated with a better TO rate (OR 2.22 [2.05-3.57] and OR 1.36 [1.14-1.63], respectively). For DP, female sex and the absence of neoadjuvant therapy predicted better TO rates (OR 1.38 [1.01-1.90] and OR 2.53 [1.20-5.31], respectively). When comparing institutions, the observedversus-expected rate for achieving TO varied from 0.71 to 1.46 per hospital after casemix-adjustment. Conclusions: TO is a novel quality measure in pancreatic surgery. TO varies considerably between pancreatic centers, demonstrating the potential benefit of quality assurance programs.