title: [PTCS/POCS].
authors: Toshio
authors: T
authors: Tsuyuguchi
authors: Harutoshi
authors: H
authors: Sugiyama
authors: Yuji
authors: Y
authors: Sakai
authors: Osamu
authors: O
authors: Yokosuka
mesh_terms: D001661:Biliary Tract Neoplasms / Q000000981:diagnostic imaging*; D002758:Cholangiography / Q000009:adverse effects; D004322:Drainage; D006470:Hemorrhage / Q000209:etiology; D006801:Humans