Anatomical reconstruction of the rotator cuff after resection of a proximal humerus tumor. (a) The structure surrounding the glenoid component. A, subscapularis muscle; B, supraspinous muscle; C, infraspinous muscle; D, teres minor muscle; E, axillary nerve. (b) The reconstructive insertion of the subscapularis muscle. Allograft fracture (arrow). (c) Postoperative X‐ray revealing that the humeral prothesis matches the glenoid component well.