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Original Articles
April 1962

Giant Keratoacanthoma Complicating Dermatitis

Arch Dermatol. 1962;85(4):485-487. doi:10.1001/archderm.1962.01590040049005
Abstract

Keratoacanthoma was first described by MacCormac3 in 1936 under the name molluscum sebaceum. He pointed out that though the lesion closely resembled a squamous epithelioma it could be distinguished by its short history; if left alone it undergoes spontaneous resolution. Although the lesions usually measure about one-half inch in diameter, they may at times reach a larger size. Gilbert1 described, on the thumb of a man, age 68, what he believed to be the largest one on record; it measured 3.7×2.5×1.5 cm. on removal. The patient we are describing here had confluent lesions covering most of the forearm, one lesion eventually measuring 6×5 cm. We would definitely have diagnosed these lesions as a squamous epithelioma had it not been for the shortness of the history, which was only 2 weeks.

Report of a Case  A male foundry laborer, age 53, was first seen on Aug. 13, 1959, with

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