Surgical classification of shoulder girdle resections. A, Type I: intraarticular proximal humeral resection. B, Type II: partial scapulectomy. C, Type III: intraarticular total scapulectomy. D, Type IV: extraarticular scapular and humeral head resection. E, Type V: extraarticular humeral and glenoid resection. F, Type VI: extraarticular humeral head and total scapular resection.