Fig. 1
Radiographs of a 7-year-old boy evaluated for arm pain and loss of function. a A bone cyst is present in the proximal humerus with deviation of the axis. b A significantly displaced pathological fracture occurred after a sudden fall. c The lesion shows signs of healing after aspiration and injection of bone marrow. d The bone cyst is healed 18 months postoperatively. e The radiograph shows the bone cyst healed at 68-month follow-up