Primary Squamous Cell Carcinoma of the Ascending Colon

Tetsuo Sumi, Makoto Mochizuki¹⁾, Yoshiaki Suzuki, Makoto Takagi, Toshiaki Aoki, Tatsuto Ashizawa, Hidenori Tomioka, Yasuharu Mori²⁾, Kenji Katsumata²⁾ and Tatsuya Aoki²⁾

Department of Digestive Tract Surgery and Department of Pathology¹⁾, Hachiouji Medical Center of Tokyo Medical University
Third Department of Surgery, Tokyo Medical University²⁾

We report a case of squamous cell carcinoma that developed in the ascending colon. The case was a 51-year-old man with lower abdominal pain as the chief complaint. Cancer of the ascending colon accompanied by multiple metastases in the liver was diagnosed, for which right hemicolectomy was performed. In histopathological examination of the total segmentation of surgical specimen, adenomatous component was detected but adenocarcinomatous component was not, and keratosis was observed, from which moderately differentiated squamous cell carcinoma was diagnosed. The patient was discharged on the day 27 after operation, but died of cancerous cachexia on day 65. As for the development of this disease, carcinogenesis from adenoma was indicated because of the involvement of an adenoma element. Because at the time of diagnosis many patients with this disease had already developed remote metastasis, the prognosis is not favorable. Advances in multidisciplinary treatments are expected to improve the results of treatment.

Key words
squamous carcinoma, colon cancer

Reprint requests
Tetsuo Sumi Department of Digestive Tract Surgery, Hachiouji Medical Center of Tokyo Medical University
1163 Tatemachi, Hachiouji-si, 193-0998 JAPAN

Accepted
December 17, 2004

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