Fig. 5

Radiographs of a chondroblastoma in the proximal humerus. Radiographs at presentation (A), initial surgery (B), time of local recurrence (C), and last follow-up (D). A 16-year-old boy presented with chondroblastoma of the proximal humerus. Curettage and ablation were performed without using high-speed burrs during the first surgical procedure. The patient underwent artificial bone grafting. Seven months after the surgery, the patient's symptoms flared, and the translucent image near the joint enlarged. The patient underwent another curettage procedure, and artificial bone grafting was performed. Seven months after the reoperation, there was no apparent local recurrence. The Musculoskeletal Tumor Society (MSTS) score was 30, although a slight degeneration was observed from the proximal humerus to the neck