title: A case of adenosquamous carcinoma of the lower bile duct diagnosed preoperatively via transpapillary biopsy.
abstract: A 78-year-old man presented to our hospital with fever and brownish urine. Upon thorough examination, a diagnosis of obstructive jaundice and acute cholangitis associated with a lower bile duct tumor was made. Endoscopic retrograde cholangiopancreatography revealed entire circumferential stenosis of the lower bile duct. Examination of a transpapillary biopsy specimen of the lesion suggested adenosquamous carcinoma. The patient underwent subtotal stomach-preserving pancreaticoduodenectomy. Histopathological examination revealed adenocarcinoma of the lower bile duct and squamous cell carcinoma components;a case of adenosquamous carcinoma was accordingly diagnosed. The lower bile duct tumor directly extended into the pancreatic parenchyma for approximately 1mm. We performed radical surgery and administered adjuvant chemotherapy with gemcitabine because of advanced neural invasion after consulting with the patient. There was no sign of recurrence 46 months after surgery. As adenosquamous carcinoma of the extrahepatic bile duct is rare, it is difficult to preoperatively diagnose the condition. Only a few cases have been reported till date.
authors: Department of Gastroenterology, Muroran City General Hospital.
authors: Yoshihiro
authors: Y
authors: Yokoyama
authors: Tomoya
authors: T
authors: Iida
authors: Hiroyuki
authors: H
authors: Kaneto
authors: Itaru
authors: I
authors: Yamamoto
authors: Kayo
authors: K
authors: Murakami
authors: Shuji
authors: S
authors: Satoh
authors: Haruo
authors: H
authors: Shimizu
authors: Kenichi
authors: K
authors: Sasaki
authors: Yasuhiro
authors: Y
authors: Konishi
authors: Shinichiro
authors: S
authors: Kon
mesh_terms: D000368:Aged; D000964:Antimetabolites, Antineoplastic / Q000627:therapeutic use; D001650:Bile Duct Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D001706:Biopsy; D018196:Carcinoma, Adenosquamous / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D017024:Chemotherapy, Adjuvant; D002760:Cholangiopancreatography, Endoscopic Retrograde; D003841:Deoxycytidine / Q000031:analogs & derivatives / Q000627:therapeutic use; D006801:Humans; D008297:Male; D016577:Pancreaticoduodenectomy; D000093542:Gemcitabine
chemical_list: D000964:Antimetabolites, Antineoplastic; D003841:Deoxycytidine; D000093542:Gemcitabine