For a patient with several weeks of right shoulder stiffness and decreased range of motion, no history of trauma, unable to take NSAIDs, and no available X‑ray, what further evaluation and management steps should be recommended?

Management of Right Shoulder Stiffness Without Available Imaging

Order an MRI of the right shoulder without IV contrast as the next imaging study, and initiate a structured physical therapy program focused on range of motion exercises while the patient is awaiting imaging results. 1

Immediate Next Steps for Imaging

Since the X-ray was reportedly completed but is unavailable for review, you need definitive soft tissue evaluation:

• MRI shoulder without IV contrast is the gold standard for assessing soft tissue pathology including rotator cuff tears, adhesive capsulitis, and labral injuries—all potential causes of progressive stiffness without trauma 1
• The ACR Appropriateness Criteria (2025) specifically recommend MRI without contrast for acute shoulder pain with normal or nonspecific radiographs when soft tissue pathology is suspected 1
• MRI has high sensitivity and specificity for full-thickness rotator cuff tears and adequately visualizes capsular pathology that could explain progressive stiffness 1

Alternative if MRI is not accessible: Ultrasound has 90-91% sensitivity and 93-95% specificity for full-thickness rotator cuff tears, though it's operator-dependent and less reliable for partial tears or when range of motion is severely limited 1

Non-NSAID Pain Management Options

Since the patient cannot take NSAIDs, consider these evidence-based alternatives:

First-Line Interventions:

• Structured physical therapy program emphasizing range of motion and strengthening exercises—this is appropriate even before confirming the diagnosis 2, 3
• Activity modification with education about favorable natural history of most shoulder conditions 4
• Topical analgesics as an alternative to oral NSAIDs 5

Second-Line Interventions:

• Subacromial corticosteroid injection: While evidence is inconclusive for rotator cuff tears specifically, multiple studies show short-term improvement in pain 2
  • Caveat: Benefits are typically limited to 2-6 weeks, and there are theoretical concerns about effects on tendon healing if surgery becomes necessary 2
  • Consider this if pain is significantly limiting function or participation in physical therapy

Additional Modalities (Weaker Evidence):

• Ice or heat application
• Manual therapy techniques
• Neuropathic pain medications if there's a neuropathic component 3

Clinical Assessment While Awaiting Imaging

Focus your examination on these specific findings:

For rotator cuff pathology:

• Pain with overhead activities
• Weakness on empty can test (supraspinatus)
• Weakness on external rotation testing
• Positive impingement signs 6

For adhesive capsulitis (frozen shoulder):

• Diffuse shoulder pain
• Restricted passive range of motion (key distinguishing feature)
• Associated conditions: diabetes, thyroid disorders 7, 6
• Progressive stiffness over weeks to months without trauma fits this pattern 7

For glenohumeral osteoarthritis:

• Gradual pain and loss of motion
• More common if patient is over 50 years old 6

Treatment Algorithm Based on Likely Diagnosis

Given the presentation of progressive stiffness without trauma over several weeks:

1. Most likely diagnosis: Adhesive capsulitis or rotator cuff pathology

   • Start physical therapy immediately focusing on gentle range of motion exercises
   • Consider corticosteroid injection if pain limits therapy participation
   • Order MRI to confirm diagnosis and rule out full-thickness tears

2. If adhesive capsulitis is confirmed:

   • Conservative treatment is primary choice with pain control and physical therapy 7
   • Stepwise rehabilitation is mandatory 7
   • Manipulation under anesthesia or arthroscopic capsular release reserved for refractory cases 7

3. If rotator cuff tear is identified:

   • Continue conservative management with exercise programs 2
   • Surgical referral only if: persistent/worsening pain despite 3-6 months of conservative care, significant functional deficit, or patient preference after shared decision-making 4

When to Refer

Reserve specialist referral for:

• Suspected serious pathology (infection, malignancy, fracture)
• Significant functional or neurologic deficit
• Features of systemic inflammatory disease
• Persistent or worsening pain after 3-6 months of appropriate conservative management 4

Critical Pitfall to Avoid

Do not rush to surgical consultation. High-certainty evidence indicates that subacromial pain does not benefit from surgical intervention, and most patients with shoulder pain fully recover with minimal intervention 4. Early imaging abnormalities often don't correlate with symptoms and may lead to overdiagnosis and overtreatment 4.