Abstract
Aneurysmal bone cysts account for less than 1% of primary bone tumors and have a predilection for the metaphyses of the long bones of the leg. Only 1% of all aneurysmal bone cysts occur in the patella. We report on a 24-year-old man with a primary aneurysmal bone cyst in the left patella treated with curettage. The defect was filled with autogenic and allogeneic cancellous bone graft. The patient experienced no pain or tenderness and had a full range of knee movement.
