keratoacanthoma
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Variants of keratoacanthoma •Solitary •Multiple •Giant (>3.0 cm diameter) •Agglomerate keratoacanthoma (aggregation of multiple lesions) •Keratoacanthoma centrifugum marginatum- large expansile lesion many cm in diameter •Subungual keratoacanthoma . Oral keratoacanthoma •Association with Muir-Torre syndrome •Arising in a nevus sebaceus •Fergusson-Smith syndrome; familial, autosomal dominant associated with a male predominance and development of innumerable lesions •Grzybowski syndrome characterized by development of very large numbers of…