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Special test for frozen shoulder

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special tests for frozen shoulder adhesive capsulitis clinical examination

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special clinical tests frozen shoulder adhesive capsulitis diagnosis

Here is a thorough breakdown of the special tests for frozen shoulder (adhesive capsulitis):

Special Tests for Frozen Shoulder (Adhesive Capsulitis)

1. Pathognomonic Clinical Finding - Loss of External Rotation

The single most important and pathognomonic sign of frozen shoulder is loss of passive external rotation. According to Bailey and Love's Surgery (28th ed.), "the pathognomonic sign is loss of active external rotation." This distinguishes it from rotator cuff tears and impingement, where passive motion is usually preserved.

2. Capsular Pattern of Restriction

Described in Rockwood and Green's Fractures (10th ed., 2025), the hallmark examination finding is restriction of movement in a "capsular pattern" - generalized stiffness with selectively greater loss of:
  • External rotation (most restricted)
  • Abduction
  • Internal rotation (least restricted)
This Cyriax capsular pattern is the classic triad used to clinically diagnose adhesive capsulitis and differentiate it from other causes of shoulder stiffness.

3. Coracoid Pain Test (Carbone, 2010)

  • How to perform: The examiner applies direct digital pressure over the coracoid process and compares tenderness on the affected vs. unaffected side.
  • Positive test: Significantly more pain on the affected side.
  • The "affected-unaffected shoulder approach" of this test has shown excellent sensitivity and specificity for diagnosing adhesive capsulitis, per a 2024 systematic review (PMC10792672).
  • Coracoid process tenderness is a widely reported feature of frozen shoulder.

4. Distension Test in Passive External Rotation

  • How to perform: The examiner passively externally rotates the shoulder to its end range, then applies a gentle axial distraction/compression force.
  • Positive test: Reproduction of the patient's characteristic deep shoulder pain.
  • This test was validated by Noboa et al. (2015) specifically for early diagnosis of adhesive capsulitis and demonstrated excellent diagnostic accuracy.

5. Range of Motion Comparison (Active vs. Passive)

While not a "special test" per se, comparing active and passive range of motion is essential:
FindingFrozen ShoulderRotator Cuff Tear
Active ROMReducedReduced
Passive ROMAlso reduced (equally)Near-normal
External rotationMost restrictedRelatively preserved
In frozen shoulder, active and passive motion are equally reduced - this is a key distinguishing feature.

6. Supporting Examination Steps (from Bailey & Love)

The structured shoulder examination for frozen shoulder includes:
  • Inspection: Muscle wasting, asymmetry
  • Palpation: Coracoid tenderness (positive in frozen shoulder), absence of warmth/redness (rules out septic arthritis)
  • Movements: Assess flexion, extension, abduction, adduction, internal and external rotation
  • Differentiation from osteoarthritis: Radiographs are normal in frozen shoulder (no joint space narrowing), whereas OA shows joint space loss

Summary

TestFinding in Frozen Shoulder
Passive external rotationMarkedly reduced (pathognomonic)
Capsular patternER > Abduction > IR restriction
Coracoid Pain TestPositive (tenderness over coracoid)
Distension Test (passive ER)Positive (pain at end-range ER)
Active vs. passive ROMBoth equally restricted
X-rayNormal (excludes OA, fracture)
The Coracoid Pain Test and Distension Test in Passive External Rotation are the two most studied specific clinical tests with validated diagnostic accuracy for adhesive capsulitis.
Sources: Bailey and Love's Short Practice of Surgery 28th Ed., p. 552 | Rockwood and Green's Fractures in Adults 10th Ed. | Systematic Review - PMC10792672
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