[A case of well differentiated mucinous carcinoma of the gallbladder].

We report a case of well differentiated mucinous carcinoma of the gallbladder. An 80-year-old man was admitted to our hospital because of fever and CT showed a mass in the fundus of the gallbladder and choledocholithiasis. Endoscopic removal of the common bile duct stones was done. Abdominal ultrasonography and CT showed a 4 cm mass in the fundus of the gallbladder. Based on a diagnosis of adenomyomatosis or mucinous carcinoma of the gallbladder, a laparotomy revealed a white mass in the fundus of gallbladder. Intra-operative pathological diagnosis of lymph node of cystic duct was mucinous carcinoma. Therefore, we conducted partial resection of the liver with D1 lymph node dissection. Pathological diagnosis confirmed well differentiated mucinous carcinoma of the gallbladder. His postoperative course was uneventful, and he is doing well without recurrence.