Schiffman CJ, Hannay WM, Whitson AJ, et al. - This study was attempted to notice the following questions regarding previous non-arthroplasty surgery prior to primary anatomic shoulder arthroplasty (either total shoulder arthroplasty [TSA] or ream-and-run arthroplasty): what degree is primary anatomic shoulder arthroplasty after prior non-arthroplasty surgery correlated with inferior clinical outcomes and higher revision rates correlated with arthroplasty without previous surgery, and does type, approach, or timing of previous surgery influence results after anatomic arthroplasty. Researchers conducted a retrospective review of a primary shoulder arthroplasty database and distinguished 640 patients undergoing anatomic shoulder arthroplasty (345 TSAs and 295 ream-and-run arthroplasties). They obtained baseline and demographic information, 2-year postoperative outcome scores, and revision surgical procedures with associated culture results. The results demonstrate that in patients undergoing index TSA, previous surgery is correlated with inferior clinical outcomes and higher revision rates but not in those undergoing the ream-and-run procedure. In addition, individuals with previous fracture surgery carry the highest risk of reoperation.