Differential Diagnosis and Management of Hand Joint Pain

Diagnostic Approach

The American College of Rheumatology suggests that the differential diagnosis for hand joint pain should be systematically approached by first distinguishing inflammatory from non-inflammatory causes, then identifying the specific joint distribution pattern and associated features to narrow the diagnosis 1.
Rheumatoid Arthritis (RA) is characterized by symmetric involvement of metacarpophalangeal (MCP) joints, proximal interphalangeal (PIP) joints, and wrists, with morning stiffness lasting >1 hour and soft tissue swelling, according to the European League Against Rheumatism 1.
Psoriatic Arthritis can target DIP joints or affect just one ray (single digit involvement), distinguishing it from RA, as noted by the American College of Rheumatology 3.

The presence of palpable synovitis, morning stiffness >30-60 minutes, soft tissue swelling, warmth, fever, weight loss, and fatigue are indicative of inflammatory features, according to the American College of Rheumatology 1.
Bony hypertrophy, crepitus, pain primarily with use, and minimal morning stiffness are characteristic of non-inflammatory features, as suggested by the European League Against Rheumatism 3.

Plain radiographs (posteroanterior, lateral, and oblique views) are the initial imaging study of choice for chronic hand pain, providing a gold standard morphological assessment, according to the American College of Radiology 5.
Ultrasound or MRI without IV contrast are appropriate for suspected tendon injury, tenosynovitis, carpal tunnel syndrome, or when radiographs are normal but clinical suspicion remains high, as recommended by the American College of Radiology 5.
Laboratory tests, including complete blood count, urinalysis, transaminases, antinuclear antibodies, ESR, CRP, rheumatoid factor, and anti-citrullinated protein antibodies, are useful in the diagnosis of inflammatory arthritis, according to the American College of Rheumatology 1.

Education and ergonomic training regarding joint protection, proper workstation setup, activity pacing, and assistive devices should be provided to every patient, as recommended by the Arthritis Care & Research journal 4.
Exercise regimen involving range of motion and strengthening exercises provides symptomatic relief and functional improvement, according to the Arthritis Care & Research journal 4.
Topical NSAIDs are the first pharmacological choice due to their superior safety profile, especially for mild-to-moderate pain affecting few joints, as suggested by the American College of Rheumatology 4.

Refer to rheumatology within 6 weeks for patients with arthritis involving >1 joint, particularly with joint swelling, morning stiffness >30 minutes, or involvement of MCP/metatarsophalangeal joints, according to the American College of Rheumatology 1.
Refer to hand surgery for severe structural abnormalities, persistent ganglion cysts, severe thumb base OA, or when conservative treatments have failed, as recommended by the American Academy of Orthopaedic Surgeons 7.