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Hip dysplasia, developmental dysplasia of the hip (DDH)〔(【引用サイトリンク】title=Your Orthopaedic Connection: Developmental Dysplasia of the Hip )〕 or congenital dysplasia of the hip (CDH)〔(【引用サイトリンク】title=Definition: congenital dysplasia of the hip from Online Medical Dictionary )〕 is a congenital or developmental deformation or misalignment of the hip joint. ==Signs and symptoms== Hip dysplasia can range from barely detectable to severely malformed or dislocated. The congenital form, teratologic or non-reducible dislocation occurs as part of more complex conditions. The condition can be bilateral or unilateral: * If both hip joints are affected one speaks of "bilateral" dysplasia. In this case some diagnostic indicators like asymmetric folds and leg-length inequality do not apply. * In unilateral dysplasia only one joint shows deformity, the contralateral side may show resulting effects. In the majority of unilateral cases the left hip has the dysplasia. If the joint is fully dislocated a false acetabulum often forms (often higher up on the pelvis) opposite the dislocated femoral head position. In actetabular dysplasia the acetabulum (socket) is too shallow or deformed. The center-edge angle is measured as described by Wiberg.〔Wiberg G. Studies of acetabular and congenital subluxation of the hip joint with special reference to complication of osteoarthritis Acta Chir Scand 1939, 83(Suppl. 58)〕 Two forms of femoral dysplasia are coxa vara, in which the femur head grows at too narrow an angle to the shaft, and coxa valga, in which the angle is too wide. A rare type, the "Beukes familial hip dysplasia" is found among Afrikaners that are members of the Beukes family. The femur head is flat and irregular. Sufferers develop osteoarthritis at an early age. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hip dysplasia」の詳細全文を読む スポンサード リンク
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