A transepiphyseal fracture of the femoral neck in a child with 2 widely displaced Salter-Harris III fragments of the capital femoral epiphysis.

To our knowledge, this is the first report of a transphyseal fracture of the femoral neck with a fracture of the capital femoral epiphysis involving 2 widely displaced Salter-Harris III fragments in a child. Preoperative surgical lateral radiographs of the hip of a 14-year-old boy clearly showed an anteriorly dislocated femoral head fragment. However, the overlapping ischium, soft tissue, and an anteriorly dislocated femoral head fragment caused a posteriorly dislocated fragment of the split femoral head to be overlooked on the radiographs. The emergent nature of the injury resulted in the performance of an open reduction without further imaging studies. Based on the initial evaluation, an anterior iliofemoral approach was chosen, which made it difficult to locate the posteriorly dislocated main fragment of the split femoral head. This case highlights that plain radiographs do not always provide adequate information for such injuries. Computed tomography or magnetic resonance imaging should be employed to enable accurate diagnosis and appropriate treatment for fracture-dislocations of the pediatric hip.