Adhesive Capsulitis

Modern Study Review (AI-Generated)

High-Yield Summary

Adhesive capsulitis, or “frozen shoulder,” is a common cause of shoulder stiffness characterized by progressive loss of both active and passive range of motion (ROM). It is strongly associated with systemic conditions such as diabetes and thyroid disorders. Early recognition and differentiation from other shoulder pathologies are critical to optimize functional recovery. Contemporary management emphasizes nonoperative treatment with a focus on pain control and gradual mobilization, reserving surgery for refractory cases.

Key Diagnostic Findings

Anatomy

Involves the glenohumeral joint capsule, particularly the rotator interval and coracohumeral ligament.
Capsular thickening and fibrosis lead to restricted joint volume and motion.

Clinical Presentation

Insidious onset of shoulder stiffness and pain, often worse at night.
Marked restriction of both active and passive shoulder ROM, especially external rotation and abduction.
Difficulty with overhead and behind-the-back activities.
Common risk factors: diabetes mellitus, hypothyroidism, hyperthyroidism, and adrenal insufficiency.

Imaging

Modality	Findings/Utility
Plain Radiographs	Usually normal; used to exclude arthritis or fractures
MRI	Capsular thickening, synovitis, rotator cuff evaluation
Ultrasound	Assess rotator cuff integrity and biceps tendon
Contrast Arthrography	Decreased joint volume and obliteration of axillary recess

Classification Systems

Traditional Neer Classification (1983): Focuses on rotator cuff involvement, less commonly used today for adhesive capsulitis diagnosis.
Modern Staging (Clinical):
Freezing Stage: Painful, progressive loss of motion (0-9 months)
Frozen Stage: Stiffness predominates, pain decreases (9-15 months)
Thawing Stage: Gradual return of motion (15-24 months)

Current Gold Standard Treatment

Non-operative Indications and Treatment

First-line for most patients, especially in early stages.
Activity modification: Avoid painful overhead activities.
Pharmacologic: NSAIDs for pain and inflammation.
Physical therapy: Gentle, progressive stretching and strengthening exercises focusing on restoring ROM without exacerbating pain.
Adjuncts: Intra-articular corticosteroid injections can provide short-term pain relief and improve motion in early stages.
Other modalities: Hydrodilatation (capsular distension) under imaging guidance may be considered in refractory cases.

Operative Indications and Treatment

Reserved for patients with persistent disabling stiffness and pain after 6-12 months of conservative management.
Arthroscopic capsular release: Minimally invasive release of contracted capsule and adhesions.
Manipulation under anesthesia (MUA): Used adjunctively or alone to break capsular adhesions.
Rotator cuff repair: Indicated if concomitant rotator cuff tear is present, especially in younger patients.
Surgical goals: pain relief and restoration of functional ROM.

Modern Complications & Outcomes

Complications

Complication	Description/Incidence
Persistent stiffness	Despite treatment, some patients have residual loss of motion
Recurrence	Rare but possible, especially in diabetics
Iatrogenic injury	Risk of nerve injury or fracture during MUA or arthroscopy
Rotator cuff tear	May coexist or develop secondary to aggressive manipulation

Outcomes

Most patients improve with nonoperative treatment within 1-3 years.
Early corticosteroid injections improve short-term pain and function but do not alter long-term prognosis.
Surgical intervention generally yields good outcomes in refractory cases, with improved ROM and pain relief.
Diabetes is associated with a more protracted course and poorer outcomes.

Classic Clinical Notes