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Paediatric septic arthritis — RCPSC EM MCQ

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HardPaediatric emergenciesPaediatric septic arthritisRCPSC EM

A 6-year-old boy refuses to bear weight and has fever 39.1°C. Hip is held flexed and externally rotated; CRP is 96 mg/L, WBC is 17 x 10^9/L, and ultrasound shows an effusion. What is the most appropriate next step?

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Correct answer: D — Urgent orthopaedic consultation for aspiration and IV antibiotics

Fever, refusal to bear weight, raised inflammatory markers, and hip effusion are concerning for septic arthritis. Joint aspiration and urgent orthopaedic management are required.

Reference: Canadian Paediatric Society bone and joint infection guidance