Fig. 3

A 1.4-year-old boy (case C). X-ray and CT suggests fractures of superior and inferior ramus of pubis and right ischium (white arrow) (A, B). Two weeks later, X-ray showed a faint bony bridge formation across the medial margin of the triradiate cartilage on the right acetabulum (C) (white arrow). Five months after the injury, X-ray showed rupture of the original bone bridge (white arrow) (D). Seven years after injury, X-ray showed that the triradiate cartilage remained open, but the medial wall of the right acetabulum had thickened, the acetabulum had become shallow, and the femoral head had shifted slightly laterally (E)