Mohs micrographic surgeryMohs micrographic surgery for tumors in the periungual and subungual location is advantageous because it is a tissue-sparing technique that preserves maximum function. Often, Mohs surgeryMohs surgery will preserve a significant amount of nailNails matrix so that with second intention healing an almost normal-appearing nailNails regrows. Traditional surgical treatmentTreatment for such tumors is wide local excisionWide local excision and skin graftingSkin grafting (either full or split); in some cases, amputation of the digitDigit is considered. The excessive amount of tissue removed with these standard surgical treatmentsTreatment may be debilitating, painful, and unsightly for the patient.