A CASE OF BASALOID CARCINOMA OF THE ANAL CANAL

Basaloid cell carcinoma of the anal canal in a malignant tumor, which is similar to a basal cell carcinoma of the skin histopathologically. In a review of the Japasese literature, 35 cases of basaloid cell carcinomas of the anal canal including our case have been reported so far. We present a case of basaloid cell carcinoma of the anal canal, together with some biliographical comments. A 64-year-old woman was admitted to our hospital because of fresh anal bleeding and a right inguinal tumor. A tumor with irregular surface was recognized between the anal canal and anal skin, and bilateral inguinal lymph nodes were swelling. A barium enema examination revealed an irregular mass in the anal canal. Squamous cell carcinoma was recognized by the biopsy specimens of the tumor. Abdominosacral rectal amputation and lymph node dissection were performed. The tumor was 2 type mass and 4×3cm in diameter, between the anal canal and anal skin. The histopathological diagnosis was basaloid cell carcinoma (T2 N2) in stage IIIb. Adjuvant chemotherapy was performed. There have been no signs of recurrence as of one year after the operation.