What is the most likely diagnosis for shoulder pain with tenderness and dysfunction consistent with impingement?

What is the most likely diagnosis for shoulder pain with tenderness and dysfunction consistent with impingement?

• A. Biceps tendinitis
• B. Rotator cuff tendinopathy/impingement
• C. Glenohumeral osteoarthritis
• D. Adhesive capsulitis

Answer: (B)

Impingement from rotator cuff tendinopathy is the pattern you’re seeing when shoulder pain and dysfunction come from irritation of the rotator cuff tendons, most commonly the supraspinatus, as the arm is lifted. The subacromial space narrows with elevation, so the tendon and nearby bursa get pinched under the acromion, causing localized tenderness and pain with overhead activities. You’ll often notice a painful arc—pain beginning around 60 degrees of abduction and worsening as the arm moves higher—along with weakness or discomfort when the arm is raised or resisted in external rotation. This fits better than other shoulder conditions: biceps tendinitis usually presents with anterior shoulder or bicipital groove tenderness and pain with resisted elbow flexion; glenohumeral osteoarthritis tends to cause deep joint pain with chronic stiffness and crepitus; adhesive capsulitis (frozen shoulder) shows global, multi-directional ROM loss with gradual onset and little focal tenderness. So the presentation aligns with rotator cuff tendinopathy/impingement.

Impingement from rotator cuff tendinopathy is the pattern you’re seeing when shoulder pain and dysfunction come from irritation of the rotator cuff tendons, most commonly the supraspinatus, as the arm is lifted. The subacromial space narrows with elevation, so the tendon and nearby bursa get pinched under the acromion, causing localized tenderness and pain with overhead activities. You’ll often notice a painful arc—pain beginning around 60 degrees of abduction and worsening as the arm moves higher—along with weakness or discomfort when the arm is raised or resisted in external rotation. This fits better than other shoulder conditions: biceps tendinitis usually presents with anterior shoulder or bicipital groove tenderness and pain with resisted elbow flexion; glenohumeral osteoarthritis tends to cause deep joint pain with chronic stiffness and crepitus; adhesive capsulitis (frozen shoulder) shows global, multi-directional ROM loss with gradual onset and little focal tenderness. So the presentation aligns with rotator cuff tendinopathy/impingement.