[Operative treatment of an expansive enchondroma of the distal phalanx of the thumb].

Enchondroma is the second most common benign bone tumour and the most common tumour affecting the bones of the hand. In the hand, they are most frequently found in the proximal phalanges. The case presented here is that of an expansive enchondroma in the distal phalanx of the thumb, which is rare. By operative treatment (curettage, reduction plastic and cancellous bone allografting) we were able to correct the deformity of the distal phalanx and the thumbnail almost completely, as well as improving the stability and achieving a good cosmetic result.