Keratoacanthoma of the glans penis.

A patient with a solitary keratoacanthoma of the glans penis is presented. Since this area is devoid of hair, this keratoacanthoma could not have arisen from a hair follicle as has been suggested as the cause of keratoacanthoma. Keratoacanthoma should be included in the differential diagnosis of rapidly growing keratotic tumors of the glans penis. Correct diagnosis of this tumor may save patients from needless mutilating surgery of the penis.