A Case of Adenocarcinoma arising in A Duplicated Terminal Ileum

Yukio Oshiro, Nobuhiro Ohkohchi, Chigusa Nagata¹⁾, Yukinori Inadome¹⁾, Tsuyoshi Enomoto²⁾ and Ryota Matsuo²⁾

Department of Gastroenterological Surgery, University of Tsukuba
Department of Pathology, Institute of Basic Medical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba¹⁾
Department of Surgery, Ryugasaki Saiseikai Hospital²⁾

A 40-year-old woman admitted for abdominal pain and melena was found in CT and MRI to have a 10-cm-diameter pelvic cavity mass necessitating ileocecal resection. Preoperative diagnosis was ileal gastrointestinal stromal tumor (GIST). Operative findings showed an 8-cm-diameter submucosal tumor in the terminal ileum. Histopathological findings showed adenocarcinoma arising in a duplicated terminal ileum. The thick-walled cystic tumor contained bloody fluid and the tumor appeared ileal wall. Adenocarcinoma was observed in the mucosa, invading to the muscle and subserosa. The patient was discharged without complications on postoperative day 11, required 7 courses Adjuvant chemotherapy of oral UFT/LV. The woman has had no recurrence or metastasis. To our knowledge, this is the first case of adenocarcinoma arising in a duplicated terminal ileum in Japan.

Key words
duplication of alimentary tract, malignant change

Reprint requests
Yukio Oshiro Department of Gastroenterological Surgery, University of Tsukuba
1-1-1 Tennodai, Tsukuba, 305-8575 JAPAN

Accepted
July 23, 2008

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