TechniquesAllograft-Composite Reverse Shoulder Arthroplasty for Malignant Tumor of the Proximal HumerusDegeorge, Benjamin MD; Chammas, Michel MD, PhD; Coulet, Bertrand MD, PhD; Daumillare, Alexandre MD; Lazerges, Cyril MDAuthor Information Department of Hand and Upper Extremity Surgery, Peripheral Nerves Surgery, Lapeyronie University Hospital, Montpellier, France Conflicts of Interest and Source of Funding: The authors report no conflicts of interest and no source of funding. Address correspondence and reprint requests to Benjamin Degeorge, MD, Department of Hand and Upper Extremity Surgery, Peripheral Nerves Surgery, Lapeyronie University Hospital, 191 avenue du Doyen Gaston Giraud, Montpellier 34090, France. E-mail: [email protected]. Techniques in Hand & Upper Extremity Surgery: June 2021 - Volume 25 - Issue 2 - p 94-101 doi: 10.1097/BTH.0000000000000318 Buy Metrics Abstract Composite-allograft reverse shoulder arthroplasties are a surgical alternative in malignant tumor reconstructions following segmental bone resection of the proximal humerus. They allow reinsertion of the rotator cuff tendons and reliable restoration of humeral height, increasing prosthetic stability and mobility. Preoperative local tumor extension assessment must be thorough and a strict surgical technique must be followed to obtain satisfactory functional results. The indications for this procedure include a strictly intraosseous tumor of the proximal humerus corresponding to an S3-S4 A resection following criteria provided by the Musculoskeletal Tumor Society as described by Enneking and colleagues in 1990. Certain conditions must question the procedure such as extended S3-S4-S5 bone resections, partial sacrifice of the deltoid muscle, preoperative deltoid impairment, and glenohumeral arthrectomy. Here, we report technical details and indications of composite-allograft reverse shoulder arthroplasty in the context of tumor segmental resection of the proximal humerus, especially in the humeral preparation. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.