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Walter Birnbaum, MD

JAMA. 1970;212(9):1511-1513.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Carcinoma of the colon is almost always adenocarcinoma, (Greek adenos gland) which arises from the glandular mucosa lining this viscus. Squamous cell carcinoma or acanthoma (Greek akantha, thorn or prickle) occurs in the anal canal, the lining of which is squamous epithelium, or in the lower part of the rectum adjacent to the anal canal where it may have originated from the nearby squamous or transitional cells. Adenocanthomas are carcinomas in which both glandular and squamous elements are present.

Rarely has squamous cell carcinoma been reported to occur in the colon above the peritoneal reflection although it is possible that this tumor may occur more frequently than the number of published case reports would indicate. From 1907, when Herxheimer¹ presented the case of a patient with adenoacanthoma of the cecum, to 1966, only two squamous cell carcinomas and five additional adenoacanthomas of the colon, excluding the rectum, had been . . . [Full Text PDF of this Article]

Author Affiliations
From the University of California School of Medicine, San Francisco.

Footnotes
Read before the Section on Colon and Rectal Surgery at the 118th annual convention of the American Medical Association, New York, July 16, 1969.

Reprint requests to 490 Post St, San Francisco.

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