Patients with glenohumeral osteoarthritis, rheumatoid arthritis, or rotator cuff arthropathy who are poor surgical candidates or who are not interested in pursuing surgery randomized to intraarticular corticosteroid injection (IACI).

Patients with glenohumeral osteoarthritis, rheumatoid arthritis, or rotator cuff arthropathy who are poor surgical candidates or who are not interested in pursuing surgery randomized to suprascapular nerve block (SSNB)

The patient will be in a seated position. Correct patient, laterality, and procedure will be performed during the timeout. Ultrasound guidance will be used to identify the glenohumeral joint. The injection site will then be disinfected with an alcohol wipe. A 21, 22, or 23-gauge needle (depending on provider preference) will be advanced into the glenohumeral joint under direct ultrasound visualization. After entry into the glenohumeral joint, a negative aspiration will be performed. At that time, up to 1 mL of 40mg/mL methylprednisolone acetate will be injected be injected into the joint space.

a validated continuous scale assessment for pain

a validated tool providing a numerical score from 0-100 that assess shoulder function as subjectively reported by the subject. A higher score indicates superior shoulder function.

a validated patient-reported outcome measure used to assess shoulder pain and functional disability. Possible scores range from 0-48 with higher scores indicating superior better shoulder function.

a validated survey with possible scores from 0-100 that assesses shoulder function as reported by the subject. A higher score indicates superior shoulder function.