Updated Japanese multicenter registry study evaluates the efficacy and safety of proton beam therapy for treating extrahepatic cholangiocarcinoma.Yamazaki H, Shibuya K, Kimoto T, et al. Sci Rep. 2025 Jul 2;15(1):23250. doi: 10.1038/s41598-025-06575-9. PMID: 40603425. 【背景と目的】・胆道がんは比較的まれな悪性腫瘍であるが、近年その…