Painless limp as a presentation of pelvic eosinophilic granuloma in a child.

Painless limp in children continues to pose a diagnostic challenge. In the majority of the cases transient synovitis of the hip is the cause. However, bone tumours should be considered as a possibility and specifically looked for when a child continues to have ongoing symptoms. Failure to diagnose tumours at an early stage can lead to a poorer outcome. This case report describes a child with eosinophilic granuloma who presented with a progressive painless limp. It emphasises the need to look carefully at the pelvic bones when evaluating a hip radiograph.