Child with refusal to bear weight, fever, leukocytosis and increased ESR, consistent with septic arthritis
Septic arthritis: Leads to fever, ill-appearance, leukocytosis, failure to bear weight, synovial fluid WBC > 50,000 with positive gram stain and culture, treated with draining joint space + antibiotics
Transient synovitis: Patient will be afebrile, well-appearing between 2-6 years old, often had a previous viral URI, ability to bear weight, normal ESR, WBC count and synovial fluid analysis, condition is self-limited
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