Abstract: Aneurysmal bone cysts are classified as benign, tumor-like bone lesions and are among the most common manifestations in childhood and adolescence. Surgical approaches may include curettage and filling with cancellous bone or cement, insertion of an ESIN, or the use of chemical adjuvants such as phenol. The patient was admitted based on X-ray and CT findings and taken up for surgery. The anterior approach to the proximal humerus was used. The cephalic vein was identified and preserved. The subscapularis muscle was left intact. Subperiosteal dissection was performed while keeping the muscle cuff intact. Humerus osteotomy was performed. Curettage from the bony canal was performed, and a freeze-dried allograft was removed from the bone bank, cut into slivers, and packed into the canal. Closure was performed. Patients were followed up on days 2, 14, 30, 60 and 120. The patient recovered 90% of her preoperative ROM and was advised to continue physiotherapy. The patient had no postoperative complaints, and the X-ray showed signs of bone healing. The effect of various treatment modalities on ABC management has been repeatedly examined in the literature, but the natural history of ABC and the optimal treatment remain unclear. In our opinion, surgical curettage and cyst excision with bone grafts are the optimal choices for treating ABCs and are significantly better than injections and fixation procedures. Treatment of ABCs with allografts may decrease reoperation rates. The initial radiographic appearance after allograft treatment revealed solid structural support, followed by new bone formation. This appearance may lead to more of these patients being treated with this approach.
