Management of biliary tract cancers in early‐onset patients: A nested multicenter retrospective study of the ACABI GERCOR PRONOBIL cohort

Background & Aims Accumulating data has shown the rising incidence and poor prognosis of early‐onset gastrointestinal cancers, but few data exist on biliary tract cancers (BTC). We aimed to analyse the clinico‐pathological, molecular, therapeutic characteristics and prognosis of patients with early onset BTC (EOBTC, age ≤50 years at diagnosis), versus olders. Methods We analysed patients diagnosed with intrahepatic cholangiocarcinoma, extrahepatic cholangiocarcinoma, and gallbladder adenocarcinoma between 1 January 2003 and 30 June 2021. Baseline characteristics and treatment were described in each group and compared. Progression‐free survival, overall survival and disease‐free survival were estimated in each group using the Kaplan‐Meier method. Results Overall, 1256 patients were included, 188 (15%) with EOBTC. Patients with EOBTC demonstrated fewer comorbidities (63.5% vs. 84.5%, p