Solid organ transplant patients do well after shoulder arthroplasty: a propensity matched analysis

Background: Solid organ transplant (SOT) recipients are commonly prescribed immunosuppressive therapies which may predispose patients to higher infection and complication rates following total shoulder arthroplasty. This article aims to analyze the effects SOT and subsequent immunosuppressive regimens have on the functional and patient-reported outcomes of total shoulder arthroplasties. Methods: A single institution, multisurgeon retrospective case-control study investigating the functional and patient-reported outcomes of shoulder arthroplasty after SOT was conducted between the years of 2010 and 2020. To be included in the study, patients must have undergone SOT prior to primary total shoulder arthroplasty. A 4:1 match-paired control group lacking SOT prior to arthroplasty was then constructed. Thirty-four SOT patients (18 males and 16 females) and 136 control patients (77 male and 59 female) were included in the study. Patients were analyzed who underwent SOT prior to shoulder arthroplasty, with outcomes compared to controls that only underwent arthroplasty. The primary outcomes include range of motion and strength in forward elevation, external rotation, and internal rotation, and patient reported outcomes. Results: There was no significant difference in improvement for range of motion and strength between the 2 cohorts, but within each cohort, improvement was statistically significant. In the SOT patients, forward elevation improved by 56 degrees +/- 52 degrees, external rotation increased by 13 degrees +/- 20 degrees, and internal rotation increased by 2 vertebral levels. In the non-SOT patients, forward elevation improved by 45 degrees +/- 51 degrees, external rotation increased by 16 degrees +/- 25 degrees, and internal rotation increased by 3 vertebral levels. SOT patients had equivocal visual analog scale pain and Simple Shoulder Test scores but lower American Shoulder and Elbow Surgeons (59 +/- 13 vs. 79 +/- 2; P = .002) and SANE (61 +/- 30 vs. 84 +/- 17; P < .001) scores than non-SOT patients. Complication rates were not significantly higher in the SOT group (15% vs. 6%; P = .05), but incidence of surgical revisions was not significantly different (SOT = 3%; non-SOT = 5%; P = .59). Conclusion: Shoulder arthroplasty is a safe, effective surgical intervention for improving shoulder function in patients with a history of SOT. Despite being on chronic immunosuppressive regimens, our solid organ transplants had comparable clinical outcomes and revision rates, but higher complication rates. (c) 2024 The Author(s). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).