Reverse total shoulder arthroplasty provides stability and better function than hemiarthroplasty following resection of proximal humerus tumors

Tumors may necessitate resection of a substantial portion of the proximal humerus and surrounding soft tissues, making reconstruction challenging. We evaluated outcomes in patients undergoing treatment of tumors of the proximal humerus with reverse total shoulder arthroplasty (rTSA) or shoulder hemiarthroplasty. Patients who underwent rTSA (n = 10) or shoulder hemiarthroplasty (n = 37) for tumors of the proximal humerus in 2009 to 2017 were reviewed. Of these patients, 27 had died, leaving 20 for review. The mean follow-up period of the survivors was 27.1 months. They were evaluated clinically and contacted to determine the American Shoulder and Elbow Surgeons score, Simple Shoulder Test score, and visual analog scale score. Postoperative complications occurred in 13 hemiarthroplasty patients (34%). Tumor recurrence occurred in 3 hemiarthroplasty patients (7.9%), whereas in the rTSA group, 1 patient (10%) had a postoperative complication, with no recurrences. One hemiarthroplasty patient required revision surgery with rTSA to improve shoulder function. Six dislocations and two subluxations occurred in the hemiarthroplasty group, whereas no subluxations occurred in the rTSA group (P = .14). Mean range of motion was 85° of forward flexion for rTSA patients (n = 10) compared with 28° for hemiarthroplasty patients (P < .001). The mean American Shoulder and Elbow Surgeons score was 63 for hemiarthroplasty patients (n = 5) and 59 for rTSA patients (n = 4). The mean Simple Shoulder Test scores were 3.8 and 2.4, respectively. The mean visual analog scale pain scores were 2.4 and 2.5, respectively. Reverse total shoulder arthroplasty can reproducibly reconstruct the shoulder in patients requiring oncologic proximal humerus resection. Patients have good outcomes, better range of motion, and no increase in instability rates compared with hemiarthroplasty.