Intraductal papillary mucinous neoplasm originating from a jejunal heterotopic pancreas: report of a case |
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Authors: | Hiroshi Okamoto Fumiyoshi Fujishima Kazuyuki Ishida Ken Tsuchida Takuya Shimizu Hitoshi Goto Akira Sato Susumu Satomi Hironobu Sasano |
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Affiliation: | 1. Division of Advanced Surgical Science and Technology, Graduate School of Medicine, Tohoku University, 1-1, Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan 2. Department of Pathology, Tohoku University Hospital, Sendai, Japan 3. Department of Pathology, Graduate School of Medicine, Tohoku University, 1-1, Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan
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Abstract: | We report a rare case of an intraductal papillary mucinous neoplasm (IPMN) originating from a jejunal heterotopic pancreas, found incidentally during surgery. A 75-year-old woman was referred to our department for surgical treatment of an abdominal aortic aneurysm (AAA) and a concurrent oropharyngeal tumor. During surgery to correct the AAA, we found a jejunal tumor incidentally and performed partial resection of the jejunum. Microscopically, the jejunal tumor showed dilated ducts containing intraluminal papillae lined with mucinous epithelium with low-grade cytological and architectural atypia within the pancreatic tissue. Immunohistochemical staining revealed MUC1 (?), MUC2 (?), MUC5AC (+), and MUC6 (?) proteins. To the best of our knowledge, only six cases of IPMN originating from a heterotopic pancreas have been reported in English, and this is the first report of an IPMN originating from a jejunal heterotopic pancreas. |
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