What are the typical symptoms of glenohumeral (shoulder) joint arthritis and the recommended initial management?

Glenohumeral Joint Arthritis: Clinical Presentation and Management

Primary Symptoms

Glenohumeral arthritis typically presents with progressive shoulder pain, stiffness, and loss of function, often with a long history of symptoms or acute exacerbations of chronic pain. 1

Key clinical features include:

• Pain: May occur at rest or with motion; motion-related pain responds better to physical therapy than rest pain 2
• Decreased shoulder range of motion (ROM): Progressive restriction in elevation and internal/external rotation 2, 3
• Abnormal scapular motion: Develops as compensation for restricted glenohumeral movement 2
• Functional limitations: Difficulty with daily activities and overhead movements 1, 3

Initial Conservative Management Algorithm

Treatment should be dictated by patient age, severity of symptoms, radiographic findings, and medical comorbidities. 4

First-Line Conservative Approach:

1. Physical Therapy 2

• Target pain reduction through appropriate exercise selection based on whether pain is at rest or with motion
• Increase shoulder ROM by identifying and treating specific soft tissue restrictions
• Implement rotator cuff strengthening exercises to protect the glenohumeral joint
• Address scapular dyskinesis

2. Pharmacological Management 2

• NSAIDs as first-line therapy for pain reduction and inflammation control
• Oral vitamin C and vitamin D supplementation may slow cartilage degeneration
• Pain control enables more effective physical therapy participation

3. Injectable Options (with important caveats):

• Corticosteroid injections: Insufficient evidence to recommend for or against use (Grade I recommendation) 5, 4
• Viscosupplementation (hyaluronic acid): Weak evidence supporting use as a treatment option (Grade C recommendation) 5, 4
• One industry-supported study showed improvements with three weekly Hylan G-F 20 injections 5

4. Biologics (emerging but limited evidence):

• Platelet-rich plasma, bone marrow aspirate concentrate, and mesenchymal stem cells show promise for pain reduction 2
• Critical caveat: These do not stop OA progression or improve the underlying arthritis, only provide symptomatic relief 2

Surgical Management When Conservative Treatment Fails

Decision Algorithm:

For patients with intact rotator cuff:

• Total shoulder arthroplasty (TSA) is superior to hemiarthroplasty (Grade B recommendation, moderate evidence) 5, 4
• TSA provides better pain relief and global health assessment scores compared to hemiarthroplasty 4
• 14% of hemiarthroplasty patients require revision to TSA due to progressive glenoid arthrosis and pain 4

For patients with irreparable rotator cuff tears:

• TSA is contraindicated (consensus recommendation from AAOS) 6, 4
• Reverse shoulder arthroplasty (RSA) is the appropriate choice in this population 6

For younger patients (<50 years):

• Avoid arthroplasty when possible due to increased risk of prosthetic loosening and decreased survivorship 5, 4
• Consider arthroscopic debridement (Comprehensive Arthroscopic Management) as a bridging procedure 7
• CAM procedure shows 77% survival at 5 years and 63% at 10 years 7
• Predictors of CAM failure: joint space <2mm, humeral head flattening, abnormal posterior glenoid morphology 7

Critical Pitfalls to Avoid

1. Surgeon Volume Matters:

• Avoid surgeons performing <2 shoulder arthroplasties per year to reduce immediate postoperative complications (Grade C recommendation) 4

2. Rotator Cuff Assessment is Mandatory:

• Never perform TSA in patients with irreparable rotator cuff tears—this leads to poor outcomes and likely revision surgery 6

3. Perioperative VTE Prophylaxis:

• Use mechanical and/or chemical venous thromboembolism prophylaxis for all shoulder arthroplasty patients (consensus recommendation) 6, 4

4. Realistic Expectations:

• Shoulder arthroplasty complications occur in up to 39.8% of cases with revision rates up to 11% 4
• Common complications include glenoid erosion (20.6%) for hemiarthroplasty and glenoid loosening (14.3%) for TSA 4

Evidence Quality Note

Most recommendations for glenohumeral OA are extrapolated from hip and knee literature rather than shoulder-specific studies, highlighting the need for caution in applying these treatments. 4 The AAOS guideline contains nine inconclusive recommendations out of 16 total, reflecting the limited high-quality evidence in this area. 5