Anteroposterior radiograph of hips and pelvis in Patient 1 at 6 years of age shows bilateral sclerotic, fragmented, and flattened proximal femoral epiphyses (asterisks), irregular acetabula (arrowheads), and coxa valga deformities. The patient was initially diagnosed with Legg–Calve–Perthes disease; in retrospect, acetabular irregularities and coxa valga would not be typical in this condition