Knock knees

Definition:
Knock knees are an outward angulation of the lower legs, such that when the knees are touching the ankles are separated.

Causes, incidence, and risk factors:
Most children develop a slight knock-kneed stance by the time they are 2 or 3 years old, often with significant separation at the ankles when the knees are touching. This is part of normal development and often persists through age 5 or 6, at which time the legs begin to straighten fully. By puberty, most children can stand with the knees and ankles touching (without forcing the position).

Knock knees can also develop as a result of disease processes. Most often the cause has already been diagnosed and the knock knees are recognized as a symptom of the condition.


Review Date: 5/28/2003
Reviewed By: David M. Scher, M.D., Department of Orthopaedic Surgery, NYU-Hospital for Joint Diseases, New York, NY. Review provided by VeriMed Healthcare Network.

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