A case of an alpha-fetoprotein-producing intrahepatic cholangiocarcinoma - Fukuda, Takahiro; Onoe, Takashi; Tanimine, Naoki; Saito, Akihisa; Yamamoto, Rie; Hashimoto, Tatsunori; Tazuma, Sho; Sudo, Takeshi; Kuraoka, Kazuya; Tashiro, Hirotaka (Clinical Journal of Gastroenterology, 2025)