Curative resection of borderline resectable perihilar cholangiocarcinoma following neoadjuvant gemcitabine and cisplatin plus durvalumab immunochemotherapy: a case report. - Tanaka, Shogo; Tsukuda, Hiroshi; Okada, Takuma; Tanaka, Akihiro; Sawada, Ryugo; Yukimoto, Kiyotaka; Tamamori, Yutaka; Fumimoto, Yuichi; Hiramatsu, Shinsuke; Ohta, Yoshio (Journal of Surgical Case Reports, 2026)