The Journal of Bone and Joint Surgery, Vol 61, Issue 2 256-259, Copyright © 1979 by Journal of Bone and Joint Surgery, Inc
Subungual exostoses
GC Landon, KA Johnson and DC Dahlin
From 1910 through 1975, forty-four patients with subungual exostoses were
seen at the Mayo Clinic. Thirty-four of them had the exostosis on the great
toe. Forty-three of the patients were treated by local excision and one was
treated by amputation of the hallux. Five patients had local recurrence.
None of the tumors underwent malignant change. Histologically, the tumors
consisted of a proliferating fibrocartilaginous gap that merged into mature
trabecular bone at its base. The growth in the cap was so active that is
sometimes mimicked sarcoma, but no true anaplasia was seen. The subungual
exostoses were uniformly benign, and local excision was the treatment of
choice.