Monoarticular arthritis
Background
Clinical Features
Differential Diagnosis
Septic Arthritis
- Gonococcal Arthritis
- Nongonococcal Arthritis
- Arthritis-Dermatitis Syndrome
Crystal-Induced Monoarthritis
Traumatic
- Fracture
- ligamentous
- Overuse
Ischemic
- Avascular necrosis
- Decompression illness
- Spontaneous osteonecrosis
- pain in abscence of trauma
- femoral head, medial conyle of knee
Hemorrhagic
- Posttraumatic
- Hemophilia
- Systemic anticoagulation
Neoplastic
- Mets
- Osteochondroma
- Osteoid osteoma
- Pigmented villonodular synovitis
Systemic Disease
- Remote infxn, infectious endocarditis
- Rheumatic fever
- Seronegative (no RF) spondyloarthropathies (AS, IBS, psoriatic, reactive or Reiter's)
- Rheumatoid arthritis, SLE
- Sarcoidosis, amyloidosis
Periarticular (mimic joint involvement)
- Cellulitis
- Tendonitis
- Bursitis
Pediatric
- Transient (Toxic) Synovitis (Hip)
- Children 3-10yo
- 1-3 wks after viral illness
- Slipped Capital Femoral Epiphysis (SCFE)
- portly pubescent
- Legg Calve Perthes Disease
- young school-age children