Dislocation usually occurs as a result of sudden direction changes while running and the knee is under stress or it may occur as a direct result of injury.
Review Date 11/5/2018
Updated by: C. Benjamin Ma, MD, Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery, San Francisco, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.