Wright-Chisem J, Apostolakos JM, Dines JS, et al. - Researchers investigated if prior ipsilateral shoulder arthroscopy is linked with a raised risk of postoperative infection following shoulder arthroplasty. Using Current Procedural Terminology codes from two large insurance databases, including both private-payer (Humana, 2008-2017) and Medicare (2006-2014) data, they assessed patients who underwent shoulder arthroplasty, including hemiarthroplasty (HA), total shoulder arthroplasty, or reverse shoulder arthroplasty with a minimum of 1 year preoperative database exposure. They assessed a total of 9,362 Medicare patients and 17,716 private-payer patients. Among these, 486 (5.2%) Medicare patients and 685 (3.9%) private-payer patients had prior arthroscopy. Findings suggest correlation of performing shoulder arthroscopy within 2 years before shoulder arthroplasty with a higher infection rate in the first year after shoulder arthroplasty.