Comparing Platelet Rich Plasma and Corticosteroid for Military & Civilian Patients With Glenohumeral Osteoarthritis

"Minimum 2cc Leukocyte Poor Platelet Rich Plasma~The PRP will be prepared by drawing 60cc blood from the participant through venipuncture, spinning the blood sample in a centrifuge and then injecting the platelet rich plasma (approximately 2-5cc or max collected) into the study shoulder using ultrasound guidance. This sample will be prepared by the study provider (physician assistant or physician). Any leftover blood will be safely discarded per standard protocols."

5cc Normal Saline + 2cc 10 mg/ml Triamcinolone Acetonide (Kenalog)

Participants randomized to the corticosteroid injection (CSI) group who report no improvement in their pain level at the 6 week post-CSI visit will be unblinded to their study injection (CSI) and will be offered the option to stay in the study and receive Platelet Rich Plasma injection.