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