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Kneecap dislocation - Overview

Alternative Names

Dislocation - kneecap; Patellar dislocation or instability

Definition of Kneecap dislocation:

Kneecap dislocation occurs when the triangle-shaped bone covering the knee (patella) moves or slides out of place. The problem usually occurs toward the outside of the leg.

Causes:

A dislocated kneecap most often occurs in women. It is usually a result of sudden direction changes while running. This puts the knee under stress.

Dislocation may also occur as a direct result of injury. When it is dislocated, the kneecap may slip sideways and around to the outside of the knee.

Arthroscopy

Patellar dislocation

Knee arthroscopy - series

Reviewed last on: 5/5/2008
Andrew L. Chen, MD, MS, Orthopedic Surgery and Sports Medicine, The Alpine Clinic, Littleton, NH. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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