Treatment of a large aneurysmal bone cyst in a 15-year-old boy using a corticospongial bone graft and a 12-year follow-up after operation.

We report the case of a 15-year-old boy with a large aneurysmal bone cyst in the third metacarpal, which was operated on radically with excision of the bone and grafting from the distal radius. At 12-year follow-up the patient had good cosmetic results and a perfectly functioning hand.