Developmental dysplasia of the hip : Overview, Causes, & Risk Factors

Alternate Names : Developmental dislocation of the hip joint, Developmental hip dysplasia, DDH, Congenital dysplasia of the hip, Congenital dislocation of the hip, CDH

Definition

Developmental dysplasia of the hip (DDH) is a dislocation of the hip joint that is present at birth. The condition is found in babies or young children.

Overview, Causes, & Risk Factors

The hip is a ball and socket joint. The ball, called the femoral head, forms the top part of the thigh bone (femur) and the socket (acetabulum) forms in the pelvis.

The hip may be all the way out of the joint or the socket may be a little shallow. One or both hips may be involved.

The cause is unknown, but genetic factors may play a role. Low levels of amniotic fluid in the womb during pregnancy can increase a baby’s risk of DDH. Other risk factors include:

• Being the first child
• Being female
• Breech delivery
• Family history of the disorder

DDH occurs in about 1 out of 1,000 births.

Pictures & Images

Congenital hip dislocation

Although most dislocations are caused by a blow, fall, or other trauma, a dislocation can also occur from birth. The cause is unknown but genetic factors may play a role. Problems resulting from very mild developmental dysplasia of the hip may not become apparent until the person is in his 30s or 40s.

• Developmental dysplasia of the hip : Overview, Causes, & Risk Factors

• Developmental dysplasia of the hip : Symptoms & Signs, Diagnosis & Tests

• Developmental dysplasia of the hip : Treatment

Review Date : 3/24/2009
Reviewed By : Jennifer K. Mannheim, CPNP, private practice, Seattle, WA; Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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