Subungual keratoacanthoma
Subungual keratoacanthoma Subungual keratoacanthoma is a rare, rapidly growing tumor that occurs under the nail (subungual = beneath the nail). It’s a variant of keratoacanthoma, which is a generally benign but locally aggressive skin tumor that resembles squamous cell carcinoma. They can be found under fingernails or toenails (usually thumb or big toe) and
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