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Contemporary Adjuvant Chemotherapy for Intraductal Papillary Mucinous Neoplasms

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60Institutions associées
20Pays d’affiliation

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Importance: Adjuvant chemotherapy regimens may be administered after pancreatic resection for adenocarcinoma arising from intraductal papillary mucinous neoplasms (A-IPMNs), although the evidence supporting their use is limited. Objective: To evaluate the survival benefit associated with contemporary adjuvant chemotherapy regimens after resection in A-IPMNs between 2017 and 2023. Design, Setting, and Participants: This retrospective cohort study was an international, multicenter study with 69 participating centers across Europe, North America, South America, and the Asia-Pacific region. Patients undergoing resection for A-IPMNs were included. Data were analyzed from May to August 2025. Intervention: Contemporary adjuvant chemotherapy regimens, such as gemcitabine-capecitabine (GemCap); 5-fluorouracil, leucovorin, oxaliplatin, and irinotecan (FOLFIRINOX), modified FOLFIRINOX (mFOLFIRINOX), and S-1. Main Outcome and Measure: Overall survival (months). Results: Among 1321 patients (median [IQR] age 70 [63 to 76] years; 713 males [54.0%] and 608 females [46.0%]), 781 patients (59.1%) received adjuvant chemotherapy, while in 181 patients (13.7%) it was omitted due to poor patient fitness. Of patients who received adjuvant chemotherapy, 568 patients (72.6%) received contemporary regimens, including GemCap (232 patients [29.7%]), FOLFIRINOX (176 patients [22.5%]), mFOLFIRINOX (71 patients [9.1%]), and S-1 (70 patients [9.0%]). The median (IQR) follow-up for the cohort was 64.2 (40.4 to 85.0) months, and the median overall survival was 73.8 months (95% CI, 66.4 to 81.9 months). After 90-day landmark analysis and exclusion of patients ineligible for chemotherapy, adjuvant chemotherapy vs no adjuvant chemotherapy (propensity score-matched populations, 243:243 patients) was not associated with improved overall survival (median, 82.3 months; 95% CI, 78.2 months to not applicable [NA] vs not reached; 95% CI, 75.3 months to NA; P = .58). Contemporary regimens vs no adjuvant chemotherapy (propensity score-matched populations, 309:309 patients) was not associated with longer survival, and a mean survival benefit greater than 4.2 months over 5 years was excluded (difference in restricted mean survival, 1.26 months; 95%, -1.72 to 4.24 months). Treatment outcomes did not vary by chemotherapy regimen or disease characteristic (eg, N stage or carbohydrate antigen 19-9 level). Conclusions and Relevance: In this study, contemporary adjuvant chemotherapy was not associated with improved overall survival in A-IPMNs, and a randomized clinical trial is indicated.

Institutions

Edinburgh Royal InfirmaryFreeman HospitalUniversity of PaduaKarolinska InstitutetHumanitas UniversityIstituti di Ricovero e Cura a Carattere ScientificoIRCCS Humanitas Research HospitalNanjing Medical UniversityJapanese Foundation For Cancer ResearchSeverance HospitalCollaborative Group (United States)Stanford MedicineSkåne University HospitalLinköping UniversityUniversity of GothenburgOslo University HospitalNational Cancer Centre SingaporeAntwerp University HospitalUniversity of CincinnatiUniversity of Cincinnati Medical CenterGhent University HospitalUniversity Hospital of North NorwayNIHR Surgical Reconstruction and Microbiology Research CentreConsorci Institut D'Investigacions Biomediques August Pi I SunyerAll India Institute of Medical Sciences RishikeshUCLouvainMartin Luther University Halle-WittenbergHôpital d'HautepierreInnsbruck Medical UniversityUniversität InnsbruckMayo Clinic in ArizonaMayo Clinic HospitalNorth Shore HospitalNottingham University Hospitals NHS TrustCapital HealthHygeia HospitalUmeå UniversityUppsala UniversityHospital de Sant PauRoyal Marsden HospitalSt James's University HospitalUniversity Hospital Schleswig-HolsteinUniversity of LübeckCambridge University Hospitals NHS Foundation TrustUniversity of LiverpoolRoyal Liverpool University HospitalRoyal North Shore HospitalRoyal Stoke University HospitalPeter MacCallum Cancer CentreMakati Medical CenterLeicester General HospitalKing's College HospitalKathmandu UniversityKindai UniversityNHS Greater Glasgow and ClydeGlasgow Royal InfirmaryUniversité Paris CitéHôpital BeaujonRoyal Free London NHS Foundation TrustStavanger University Hospital

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