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A previously well 14-year-old boy presented with a 3-day history of acute-onset, left-sided, low back pain with difficulty weight bearing. Examination showed restricted straight leg raising. Plain x ray of his hip was normal though C reactive protein (CRP) was mildly raised (27 mg/ml). He self-referred a week later with increasing pain and inability to weight bear and was admitted. Signs were unchanged …
Competing interests None declared.
Patient consent Obtained from the parents.
Provenance and peer review Not commissioned; not externally peer reviewed.