Squamous metaplasia and squamous-cell carcinoma of the rectosigmoid

Abstract
PRIMARY SQUAMOUS-CELL CARCINOMA, arising wholly in the rectosigmoid portion of the colon, occurs so rarely that the average proctologist, over a period of 30 to 40 years of practice, will never see it. Reports recorded in medical literature concerns 33 cases.Z, -% 4, s, 9-ta, 16, 17, 19, 21, 24 Squamouscell carcinoma involving the rectum, arising from the squamous epithelium adjacent to the pectina+e line, is more common, but such cases have been excluded from our study.

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