Ipsilateral Traumatic Acetabulum Triradiate Cartilage Fracture Associated with Transphyseal Fracture of Femoral Head in Children

Traumatic fracture-separation of the capital femoral epiphysis is an extremely rare lesion in children, the prognosis is generally quite poor if it is associated with initial severe fracture displacement and hip dislocation. Traumatic disruption of the acetabular triradiate cartilage is also an infrequent injury in children, can be complicated by premature fusion of triradiate cartilage and progressive subluxation of the hip joint. Combining traumatic ipsilateral acetabular triradiate cartilage fracture and transphyseal fracture of femoral head was even more rare in children, with very limited clinical case report. Here we report an extremely rare case of a 10 years old boy with combining traumatic Salter-Harris type I proximal femoral physeal fracture, and Salter- Harris type II acetabular triradiate cartilage fracture of the left hip joint. Patient was treated by open reduction with internal screw fixation, combined postoperatively traction, crutches protection, non-weight bearing and containment treatment. Avascular necrosis of left femoral head and premature fusion of the left acetabular traradiate cartilage developed later. The short-term (15 months follow-up) clinical result was fair, and the radiologic result was poor.