Reiter syndrome

Background

• Seronegative spondyloarthropathy that manifests as an acute, asymmetric, oligoarthritis (LE>UE) that occurs 2-6 weeks after infection
• Classic triad: urethritis, conjunctivitis, and arthritis ("Can't pee, can't see, can't climb a tree")

Clinical Features

• Preceding Infection
  • Urethritis: generally caused by Chlamydia or Ureaplasma
  • Enteritis: generally caused by Salmonella or Shigella
  • Preceding infection may be clinically silent

• Musculoskeletal symptoms
  • Arthritis: oligoarthritis, usually in the lower extremities
  • Enthesitis (pain at insertion sites)
  • Dactylitis (sausage digits)
  • Low back pain

• Extraarticular symptoms
  • Conjunctivitis (less frequently uveitis, keratitis)
  • GU symptoms
  • Oral lesions
  • Cutaneous and nail changes

Differential Diagnosis

• Gonococcal Arthritis
• Rheumatoid Arthritis
• Psoriatic Arthritis
• Ankylosing Spondylitis
• Lupus

Diagnosis

• Primarily a clinical diagnosis, no definitive test
• More likely if there is the presence of:
  • Characteristic musculoskeletal findings
  • Presence of preceding illness
  • Lack of more likely cause of arthritis

Management

• Treat inciting infection
• Symptomatic treatment of arthritis
  • NSAIDs are first line (naproxen, diclofenac, indomethacin)
  • Intraarticular and systemic steroids for NSAID refractory

Disposition

• Referral to a rheumatologist