label: Keratoacanthoma
label_lc: keratoacanthoma
description: "A dome-shaped, rapidly growing skin lesion composed of well differentiated squamous cells. It usually occurs on sun-exposed areas of the body, most often the head, neck, and limbs. It is considered a variant of well-differentiated squamous cell carcinoma with distinct clinical behavior. Keratoacanthomas affect males more frequently than females and the majority tend to regress spontaneously."