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Ways To Fix Functional Leg Length Discrepancy


A Leg Length Inequality or Leg Length Discrepancy is exactly as it sounds. One or more bones (the Femur or thigh bone, the Tibia or shin bone, and/or the joint spacing within the knee) are unequal in total length when measured in comparison to the same structures on the opposite side. It is common for people to have one leg longer than the other. In fact, it is more typical to be asymmetrical than it is to be symmetrical.Leg Length Discrepancy


LLDs are very common. Sometimes the cause isn?t known. But the known causes of LLD in children include, injury or infection that slows growth of one leg bone. Injury to the growth plate (a soft part of a long bone that allows the bone to grow). Growth plate injury can slow bone growth in that leg. Fracture to a leg bone that causes overgrowth of the bone as it heals. A congenital (present at birth) problem (one whole side of the child?s body may be larger than the other side). Conditions that affect muscles and nerves, such as polio.


Children whose limbs vary in length often experience difficulty using their arms or legs. They might have difficulty walking or using both arms to engage in everyday activities.


A systematic and well organized approach should be used in the diagnosis of LLD to ensure all relevant factors are considered and no clues are overlooked which could explain the difference. To determine the asymmetry a patient should be evaluated whilst standing and walking. During the process special care should be used to note the extent of pelvic shift from side to side and deviation along the plane of the front or leading leg as well as the traverse deviation of the back leg and abnormal curvature of the spine. Dynamic gait analysis should be conducted during waling where observation of movement on the sagittal, frontal and transverse planes should be noted. Also observe head, neck and shoulder movements for any tilting.

Non Surgical Treatment

Treatment is based on an estimate of how great the difference in leg length will be when the child grows up, Small differences (a half inch or less) do not need treatment. Differences of a half to one inch may require a lift inside the shoe.

Leg Length

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Surgical Treatment

For discrepancies over five centimeters, more aggressive surgical procedures-specifically leg lengthening procedures-are typically required. The specifics of this operative procedure are beyond the scope of this informational page, but your child's physician will be able to discuss the details in reference to your child's specific problems when considered appropriate.