Five Cases of Gastrointestinal Stromal Tumor of the Rectum

Yu Takahashi, Hiroshi Hasegawa, Seiji Ogiso, Masaya Shiomi, Masato Momiyama, Tuyoshi Igami, Syusaku Ohira and Takeshi Amemiya

Department of Surgery, Nagoya Daini Red Cross Hospital

Gastrointestinal stromal tumor is a relatively new concept. We experienced a GIST case and had experienced four leiomyosarcomas of the rectum by histological findngs. Immunohistochemical re-examination was peformed in all cases, anew, and all four were GIST. A 57-year-old woman complaining of abdominal fullness, constipation, dysuria was referred to the hospital with a diagnosis of pelvic tumor. Various imaging examinations were carried out, and an operation was perfomed under a diagnosis of pelvic tumor. At operation, we found the primary tumor of the rectum and abdominoperineal resection was perfomed. Histologically, the tumor was composed of spindle-shaped cells with an interweaving bundle patters. Immunohistochemically, the tumor was diagnosed as a gastrointestinal stromal tumor (GIST), uncommitted type, malignant. A concept of GIST is spreading, so we need to carry out a further examination of this desease from now.

Key words
submucosal tumor of the rectum, gastrointestinal stromal tumor

Reprint requests
Yu Takahashi Department of Surgery, Nagoya Daini Red Cross Hospital 2-9 Myoken-cho, Syouwa-ku, Nagoya, 466-8650 JAPAN

Accepted
July 28, 1999

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