Rheumatoid Hand

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Rheumatoid Hand - Fiery Fingers Genesis

  • Autoimmune basis: Chronic, systemic inflammatory disorder primarily affecting synovial joints.
  • Key pathology: Persistent synovitis.
    • Synovial lining cells proliferate (hyperplasia).
    • Forms invasive pannus tissue.
  • Destructive cascade:
    • Pannus erodes articular cartilage, subchondral bone, ligaments, and tendons.
    • Tenosynovitis is common; can lead to tendon adhesions or rupture (e.g., Vaughan-Jackson syndrome).
  • Result: Joint instability, deformity, and functional loss.

⭐ The earliest pathological changes in rheumatoid arthritis often occur in the synovium of small joints of the hands (MCP, PIP) and feet (MTP).

Deformity Parade - Twisted Manifestations

Rheumatoid Hand Deformities

  • Wrist:
    • Radial deviation & carpal ulnar translocation.
    • Volar subluxation.
    • Caput ulnae syndrome: dorsal ulnar head, supination, pain, ↓ rotation, ECU rupture.
  • MCP Joints:
    • Volar subluxation/dislocation.
    • Ulnar deviation of fingers. 📌 Mnemonic: "Wind-swept hand".
  • PIP/DIP Joints:
    • Swan Neck Deformity: PIP hyperextension, DIP flexion. Rheumatoid hand with swan neck and ulnar deviation
    • Boutonnière Deformity: PIP flexion, DIP hyperextension. Rheumatoid Arthritis Hand Deformities
  • Thumb (Nalebuff Classification):
    • Type I (Most common): MCP flexion, IP hyperextension (Boutonnière-like).
    • Type III: MCP hyperextension, IP flexion (Swan neck-like).
    • Type VI (Arthritis Mutilans): Severe bone resorption, "opera-glass hand".

⭐ Ulnar deviation at MCP joints with wrist radial deviation is classic RA hand appearance (Z-deformity).

Diagnostic Clues - Spotting the Signs

  • Symptoms: Symmetrical polyarthritis, morning stiffness >1 hr.
  • Signs:
    • MCP, PIP joint swelling & tenderness (DIPs usually spared).
    • Deformities:
      • Ulnar deviation.
      • Swan neck (PIP hyperextension, DIP flexion).
      • Boutonnière (PIP flexion, DIP hyperextension).
      • Z-thumb (MCP flexion, IP hyperextension).
      • Caput ulnae (dorsal ulnar head subluxation).
      • Vaughan-Jackson syndrome (extensor tendon ruptures, 5th→4th).
  • Labs: ↑ ESR, CRP; (+) RF; (+) Anti-CCP antibodies. Rheumatoid Hand Deformities

⭐ Anti-CCP antibodies are highly specific for RA and may predict erosive disease.

Treatment Toolkit - Mending & Modifying

  • Goal: ↓Pain, ↑Function, Correct Deformity, Halt Progression.
  • Conservative Cornerstone:
    • Pharmacological:
      • DMARDs (Methotrexate, Leflunomide, Sulfasalazine) - 1st line.
      • Biologics (TNF-α inhibitors, Rituximab) - for refractory cases.
      • NSAIDs & Corticosteroids (oral, intra-articular) - for symptom control.
    • Rehabilitation:
      • Splinting: Resting (night), Functional (day).
      • Physiotherapy & Occupational Therapy: ROM exercises, joint protection.
  • Surgical Interventions (when conservative fails or severe deformity):
    • Prophylactic: Synovectomy (early, esp. wrist, MCPs).
    • Reconstructive:
      • Tendon surgery: Repair, transfer, tenodesis (e.g., EPL rupture, Caput ulnae syndrome).
      • Arthroplasty: MCP (silicone most common), PIP, Wrist.
      • Arthrodesis: Wrist, Thumb (CMC, MCP, IP), Finger DIPs/PIPs (for stability).

⭐ MCP joint arthroplasty is preferred over fusion to preserve motion, crucial for hand function.

MCP arthroplasty X-ray with implants

High‑Yield Points - ⚡ Biggest Takeaways

  • MCP joints typically exhibit ulnar deviation and palmar subluxation.
  • Swan neck deformity is characterized by PIP hyperextension and DIP flexion.
  • Boutonniere deformity presents with PIP flexion and DIP hyperextension.
  • The most frequent thumb deformity is Nalebuff Type I (Boutonniere-like).
  • Extensor tendon ruptures are frequent; EPL rupture at Lister's tubercle is classic (Vaughan-Jackson syndrome).
  • Caput ulnae syndrome features dorsal DRUJ subluxation, pain, and supination weakness.
  • Key surgical goals include pain relief, improved function, and deformity correction.

Practice Questions: Rheumatoid Hand

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All are features of inflammatory arthritis except?

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Flashcards: Rheumatoid Hand

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_____ disease is a stenosing _____ of the extensor tendons of the first dorsal compartment of hand.

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_____ disease is a stenosing _____ of the extensor tendons of the first dorsal compartment of hand.

De Quervain's; tenosynovitis

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