Clinical features of the femoral head necrosis caused by gross teres ligament after reduction for the developmental dislocation of the hip.
OBJECTIVE
To observe the clinical features of the femoral head necrosis caused by a gross teres ligament after reduction of developmental dislocation of the hip and study its pathological causes.


METHODS
Ten hips with necrosis of the femoral head after reduction of developmental dislocation of the hip were observed. X-ray images of the hip were retrospectively reviewed with regard to the acetabular index, the acetabular-head index, the shapes and the development of the femoral heads. The operative findings were analyzed.


RESULTS
No growth or delayed growth of the femoral head and the acetabular index was found after reduction. The recovery of acetabulum was very slow. All of the cases showed the same features: femoral head necrosis, subluxation, and acetabular dysplasia. A gross teres ligament was proved during surgical operation. The femoral head recovered gradually after the operation.


CONCLUSIONS
The gross tissue interposed (a gross teres ligament) is another important pathogenesis of femoral head necrosis after the reduction of developmental dislocation of the hip. It is necessary to recognize it before reduction by imaging examinations.
Ma
R
R
Department of Pediatric Orthopedics, 2nd Clinical College, China Medical University, Shengyang 110003, China.
Ji
S
S
Liu
W
W
Zhou
Y
Y
D000077:Acetabulum / Q000000981:diagnostic imaging; D000328:Adult; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000209:etiology*; D006617:Hip Dislocation / Q000150:complications / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D011859:Radiography; D012189:Retrospective Studies