keratoacanthoma

noun
ker·​a·​to·​ac·​an·​tho·​ma | \ ˌker-ət-ō-ˌak-ˌan-ˈthō-mə \
plural keratoacanthomas also keratoacanthomata\ -​mət-​ə \

Medical Definition of keratoacanthoma

: a rapidly growing skin tumor that occurs especially in elderly individuals, resembles a carcinoma of squamous epithelial cells but does not spread, and tends to heal spontaneously with some scarring if left untreated

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