総胆管原発カルチノイドと腺癌の衝突腫ようの１例

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  • A Case of Collision Tumor of the Common Bile Duct: Carcinoid and Adenocarcinoma.

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In this paper, a very rare case of a collison tumor of carcinoid and adenocarcinoma in the common bile duct is reported. A58-year-old male was admitted to our clinic because of jaundice. An abdominal ultrasonography, computed tomography and percutaneus transhepatic cholangiography detected a tumor, 25mm in size, in the lower part of the common bile duct. A pancreaticoduodenectomy was performed under a diagnosis of carcinoma. The resected specimen was white yellow tumor, 22×25mm in size, mulberry growing and a papillary growing tumor with a different color in the lower part of the common bile duct. A histological study demonstrated the presense of a collison tumor between a carcinoid tumor that stained positively with chromogranin and a papillary adenocarcinoma. Carcinoid of the common bile duct is a very rare disease and only 36 cases have been reported. None of these cases were preoperatively diagnosed as carcinoid tumors. Furthermore, the co-existance of carcinoid and adenocarcinoma in the common bile duct has been reported in only 6 cases. The treatment for the carcinoids of the common bile duct is the same as that for carcinomas of the common bile duct.

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