Developmental dysplasia of the hip (DDH) is a childhood condition
caused by abnormal development of one or both hip joints. In DDH, the top of
the thighbone (femur) does not fit securely into the hip socket
DDH is the name for a range of conditions of the hip. In mild
cases, the ligaments and other soft tissues around the hip joint are not tight,
and they allow the thighbone (femur) to move around more than normal in the hip
socket. In more severe cases, the joint is loose enough to let the thighbone
come partway out of the hip socket. This is called subluxation. Actual
"dysplasia" is the most severe form of the condition. If a child has hip
dysplasia, the socket is too shallow, more like a saucer than the deep cup that
it should be. This allows the ball at the top of the thighbone (femoral head)
to either partly or fully slip out of the socket (dislocate).
A baby with DDH may have:
A hip joint that feels loose or slips out of
place when examined.
One thigh that appears shorter than the other.
Extra folds of skin on the inside of the thigh(s).
hip joint that moves differently than the other.
A child who is walking may walk on the toes of one foot with the
heel up off the floor or walk with a limp (or with a waddling gait if both hips
DDH is often treated by moving the upper thighbone into its normal
position and keeping it in place while the joint grows. A device called a
Pavlik harness is most often used to keep the joint in place in babies younger
than 6 months. A hard cast (spica cast) is used for older babies. Other forms
of treatment, such as surgery or a brace, also may be needed.
Susan C. Kim, MD - Pediatrics & John Pope, MD - Pediatrics
How this information was developed to help you make better health decisions.