Abstract
Colorectal carcinoma is one of the most malignant solid tumors in Western countries. With the exception of the lower rectum, most primary malignant colorectal tumors are adenocarcinomas. The frequency of adenosquamous. carcinoma of the colon is <0.1% . The first case of colorectal adenosquamous carcinoma was reported by Herxheimer in 1907 and was described as a tumor with both adenocarcinoma and squamous cell carcinoma components.
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