A Case of Sigmoid Colon Cancer with Extramural Progression

Shinpei Takeda, Wataru Takiyama, Shigemitsu Takashima, Kouichi Mandai*

Department of Surgery, *Department of Histology, Shikoku Cancer Center

A rare case of adenocarcinoma of the colon with an extramural progression is reported. The patient, a 65-year-old woman, presented with anal bleeding. Barium examination of the colon revealed a long (about 9 cm) stenotic lesion and extramural compression on the wall of the sigmoid colon. Colonoscopic examination revealed stenosis of the sigmoid colon with edema of the mucosa. The histologic findings of the biopsy material were edematous mucosa of the colon with no malignancy. By ultrasonography and X-ray CT, an irregular-shaped tumor with a diameter of 5 cm, invading the sigmoid colon and the body of the uterus, was detected. A radical sigmoidectomy was carried out with hysterectomy and bilateral salpingo-oophorectomy. Histologic examination of the operative specimens revealed moderately differentiated adenocarcinoma of the sigmoid colon, prominently proliferating into the surrounding tissues. The findings of a long stenotic lesion and extramural compression by colonography are characteristic of this tumor, as a review of the literature indicated. Abdominal X-ray CT and ultrasonography are useful for diagnosis of this type of colon cancer.

Key words
adenocarcinoma of the colon with extramural progression, stenosis of the colon

Reprint requests
Shinpei Takeda Department of Surgery, Shikoku Cancer Center
13 Horinouchi, Matsuyama, 790 JAPAN

Accepted
April 17, 1991

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