differential diagnosis of Shoulder joint pain at Sunshine Clinic

differential diagnosis of Shoulder joint pain A wide range of conditions can cause shoulder joint pain, from common musculoskeletal issues to referred pain from other parts of the body . A differential diagnosis helps distinguish between these potential causes through a careful assessment of the patient's history, physical examination, and, if needed, diagnostic imaging. Common musculoskeletal causes Rotator cuff disease This is the most common cause of shoulder pain. The rotator cuff is a group of four muscles and their tendons that stabilize the shoulder joint. • Rotator cuff tendinopathy (tendinitis/tendinosis): Inflammation or degeneration of the rotator cuff tendons, most often the supraspinatus tendon. It causes a deep, dull ache in the outer shoulder that worsens with overhead activities and lying on the affected side. • Rotator cuff tears: Partial or full-thickness tears of the rotator cuff tendons, typically occurring after trauma or chronic tendinopathy. Symptoms include weakness, difficulty lifting the arm, and night pain. • Shoulder impingement syndrome: Occurs when the rotator cuff tendons and bursa are pinched in the subacromial space. This is often associated with rotator cuff tendinopathy and bursitis. Adhesive capsulitis (frozen shoulder) This condition involves a gradual onset of shoulder pain followed by a progressive loss of both active and passive range of motion in the glenohumeral joint. It is more common in people with diabetes or thyroid disease. The diagnosis is based on the history and physical exam findings. Biceps tendinopathy This involves irritation or inflammation of the long head of the biceps tendon, which runs through the shoulder joint. • Symptoms: Pain or tenderness over the front of the shoulder, often described as a cramping sensation in the biceps. • Associated conditions: Often occurs in combination with rotator cuff disease or shoulder impingement. • Biceps tendon rupture: A sudden, painful pop followed by bruising and a 'Popeye' muscle deformity in the upper arm. Acromioclavicular (AC) joint disorders The AC joint is located at the top of the shoulder. Problems here cause localized pain. • AC joint arthritis: Degeneration of the cartilage in the AC joint, causing pain with overhead and cross-body movements. • AC joint sprain/separation: A common sports injury resulting from a fall onto the tip of the shoulder. Causes pain, tenderness, and potentially a visible deformity. • Distal clavicle osteolysis: The gradual breakdown of the outer end of the collarbone, often seen in weightlifters due to repetitive stress. Glenohumeral arthritis (shoulder arthritis) This is wear-and-tear arthritis of the main ball-and-socket shoulder joint. It causes deep, aching pain and stiffness that worsens over time. A history of prior trauma or rotator cuff tears increases the risk.