[Subungual exostosis].

A 56-year-old male patient suffering from subungual exostosis of the big toe is reported. The painful tumour was treated ineffectively for a number of years after being mistaken for verruca vulgaris. The histological diagnosis was benign osteochondroma, having a roentgenographic appearance of exostosis. Local curettage of the subungual exostosis is the treatment of choice.