Open transosseous repair of proximal deltoid muscle rupture following reverse total shoulder arthroplasty in a patient with os acromiale: a case report

Reverse total shoulder arthroplasty (rTSA) has become increasingly utilized to restore shoulder function, improve quality of life, and reduce pain in patients with glenohumeral osteoarthritis, massive irreparable rotator cuff tears, rotator cuff arthropathy, among other conditions. Reported outcomes following rTSA have been generally favorable, including patients with os acromiale.3 However, rTSA is not without complications. Commonly reported complications include scapular notching, infection, instability, implant loosening, and periprosthetic fracture.