Subungual exostosis is a benign tumor or cartilaginous bone beneath or adjacent to the nail. It is usually a solitary lesion that develops most often in the substance of the great toe and less frequently in other toes. It rarely occurs in the fingers. We present a case of subungual exostosis of the finger. At 4-year follow-up, the result was excellent, with no sign of recurrence.
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lizuka et al. (1995) studied this question.