A 52-year-old male construction worker presents with a 3-month history of progressive right shoulder pain and weakness. On examination, he has positive Neer's impingement sign, positive Hawkins-Kennedy test, and mild weakness of shoulder abduction. X-rays show no fracture or dislocation. What is the most appropriate next step in management?

Explanation

## Management of Subacromial Impingement Syndrome **Key Point:** In a patient with clinical signs of subacromial impingement (positive Neer's and Hawkins-Kennedy tests) and *mild* weakness on a background of 3 months of symptoms, the standard first-line management is conservative therapy — corticosteroid injection combined with physiotherapy — before advanced imaging or surgical intervention. ### Clinical Reasoning This 52-year-old construction worker presents with: - Positive impingement signs (Neer's, Hawkins-Kennedy) - **Mild** weakness of shoulder abduction (not severe/complete loss) - Normal plain radiographs (no fracture, dislocation, or calcification) - 3-month progressive history This clinical picture is consistent with **subacromial impingement syndrome**, which is primarily a clinical diagnosis. The presence of *mild* weakness does not mandate immediate MRI; it is consistent with pain inhibition rather than a full-thickness rotator cuff tear. ### Why Conservative Management (Option C) is the Best Next Step Per standard orthopaedic and sports medicine guidelines (Harrison's Principles of Internal Medicine; Rockwood & Matsen, Shoulder, 5th ed.): 1. **First-line treatment for impingement syndrome** is conservative: subacromial corticosteroid injection + structured physiotherapy (rotator cuff and scapular stabiliser strengthening). 2. **MRI is reserved** for cases where conservative management fails (typically after 6–12 weeks), or when there is severe/progressive weakness, complete loss of active elevation, or clinical suspicion of a full-thickness tear. 3. **Immediate surgery** (arthroscopic decompression) is never appropriate without a trial of conservative therapy and imaging confirmation. 4. **CT scan** has no role in primary assessment of rotator cuff pathology. ### Management Algorithm | Stage | Action | |---|---| | Initial (0–6 weeks) | Subacromial corticosteroid injection + physiotherapy + NSAIDs | | Failure of conservative Rx | MRI shoulder to assess rotator cuff integrity | | MRI confirms tear | Surgical consultation (arthroscopic repair/decompression) | **High-Yield:** The "best next step" in impingement syndrome with *mild* weakness and normal X-rays is conservative management first. MRI is the next step only if conservative therapy fails or if there is clinical suspicion of a significant rotator cuff tear (severe weakness, drop arm sign, complete loss of active abduction). **Clinical Pearl:** Mild weakness in impingement is often pain-inhibited weakness, not structural tear weakness. Reserve MRI for failure of conservative management or red-flag features (e.g., drop arm sign, acute severe weakness after trauma).