[A boy with a wart-like lesion of the toe].

A 10-year-old boy consulted a dermatologist with a painful, subungual tumour on one of his toes. X-ray showed an outgrowth of the distal phalanx and histopathological investigation showed osteochondromatous proliferation. The patient was diagnosed with exostosis. Subungual exostoses are benign osteocartilaginous tumours that occur beneath the nail bed. Excision was performed, the patient recovered well.