Figure 2

Male patient, 19 years old, with chondroblastomas of the left proximal humerus. (A) Presurgical X-ray and computed tomography scan showing expansive lesion growth in the proximal humerus and thinning of the bone cortex with bony septum and scattered calcifications. Presurgical magnetic resonance imaging indicates T2-weighted images of tumors with inhomogeneous moderate signals and scattered high signals complicated by edema and swelling of the surrounding soft tissues and the rotator cuff insertion adjacent to tumors. (B) Sketch map of osteotomy of the greater tuberosity of the humerus showing osteotomy line (red) without injury to the subscapularis muscle, infraspinous muscle, or insertion of the supraspinatus muscle. (C) Intraoperative treatment showing osteotomy and fenestration performed via the greater tuberosity of the humerus and repeated cauterization with an argon gas knife. Autogenous and artificial bones were grafted. The defective region of the aneurysm shell was then covered with autologous iliac bone containing cortical bone and treated with internal fixation using an anatomical titanium alloy plate. (D) X-ray at postsurgical months 12 and 24 revealing no local recurrence. (E) Internal fixation was removed after 24 months, resulting in normal left shoulder joint function, good Enneking score and no pain.