Etymed
keratoacanthoma
Definition
A rapidly growing, dome-shaped skin lesion with a central keratin-filled crater, typically on sun-exposed areas, that often regresses spontaneously
Clinical context
A 65-year-old man presents with a rapidly growing, flesh-colored nodule on his forehead that has been present for 3 months. The lesion has a central crater filled with keratin and a raised, horn-like border. Biopsy reveals a well-differentiated keratoacanthoma with characteristic histology.
Mnemonic
Keratoacanthoma = 'Keratin' crater with 'Acantho' (thickened) borders