Functional outcome in critical-size defect aneurysmal bone cyst of the distal humerus patient treated with curettage and nonvascularized autologous fibular graft

Aneurysmal bone cyst (ABC) is a rare benign expansive cystic lesion characterized by blood-filled cavernous spaces separated by septae containing osteoid tissue and osteoclast giant cells. Treatment goals are to stop progression of the lesion, relieve pain, stabilize pathologic fractures, and reduce recurrence rates. The standard of care for ABCs is curettage with or without bone graft depending on the resultant void. Despite best efforts at curettage, clinical series have shown highly variable recurrence rates, with some series showing rate ranges from 0% to 100%. Tumor resection may be associated with critical bone loss. Critical-size defects require reconstruction. Other than that, functional outcome after surgical treatment in patients with critical size defect is still a challenge even in benign tumor case. We reported a 32-year-old female presenting an entirely contained ABC to the distal metaphysis of the humerus treated with curettage and nonvascularized autologous fibular bone graft.