A Case of Subungual Osteochondroma / 대한피부과학회지

ABSTRACT

Subungual osteochonroma is a benign bone tumor of the fingers and toes. Clinically it may present as a slow-growing firm mass causing deformity of the overlying nail. It must be differentiated from other subungual masses such as verruca vulgaris, subungual exostosis and enchondroma. Here we present a case of subungual osteochondroma of the right 1st toe presenting as a verrucous skin lesion in an 11-year-old male. Radiographic examination showed an outgrowth of the bony tissue on the dorsum of the distal phalangeal bone beneath the nail. Histopathologic examination revealed a characteristic trabecular bone formation covered with a hyaline cartilage cap. The lesion was successfully treated by total excision and curettage of the underlying bony surface.