leg length discrepancy
A condition caused by an anatomic–true leg length discrepancy (LLD), or functional inequality of leg length–false LLD, resulting in mechanical disturbances of gait and posture when the difference is > 3 cm
Clinical findings Back and knee pain due to compensatory pelvic tilt, lumbar scoliosis, backache and rheumatologic symptoms; the longer leg is held in flexion with excess lateral strain, causing premature degenerative changes and valgus deformity due to a collapse of the lateral compartment. It may affect the heart rate, muscle activity and O2 consumption.
Aetiology Various congenital and acquired musculoskeletal disorders as well as joint contractures
Compensation strategies Steppage, circumduction, vaulting, hip hiking
Synonyms Anisomelia, leg length discrepancy, leg length inequality, limb length discrepancy, limb length inequality, long leg syndrome, long-short leg syndrome, short leg syndrome, short-long leg syndrome