Transient Synovitis Diagnosis — RACP Paediatrics MCQ

Instant feedback + full explanation. One question, done properly.

EasyInfectious DiseaseTransient Synovitis DiagnosisRACP Paediatrics

A 5-year-old girl presents with a limp. She has no fever. Examination shows limited abduction of the right hip with a positive Trendelenburg sign. X-ray is normal. USS shows a small hip effusion. CRP is <5 mg/L and WCC is normal. What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — Transient synovitis

Transient synovitis (irritable hip): most common cause of acute hip pain in children 3-10 years. Presents with limp and limited ROM, typically following viral illness. Normal inflammatory markers and a small effusion on USS. Meets 0-1 Kocher criteria (septic arthritis very unlikely). Treatment is rest and NSAIDs; resolves within 1-2 weeks.

Reference: RCH Melbourne – 2024 – Clinical Practice Guidelines: Limp