DDx ⬇
- Rotator cuff tendinitis ("impingement") or tear
- Subacromial bursitis
- Biceps tendinitis
- Osteoarthritis (acromioclavicular joint; rare in glenohumeral joint)
- Frozen shoulder (adhesive capsulitis)
- Acromioclavicular (AC) separation
- Neck disorder, eg, osteoarthritis, herniated disk, tumor
- Rheumatoid or septic arthritis
- Calcific tendinitis
- Shoulder dislocation or fracture
- Avascular necrosis
- Polymyalgia rheumatica
- Fibromyalgia
- Thoracic outlet syndrome
- Brachial plexus neuropathy
- Referred pain from gallbladder, heart, diaphragm, Pancoast tumor
- Metastatic or primary tumor
Related DDx ⬆