A torn (MCL), is an injury to the medial collateral ligament. This ligament extends from the upper-inside surface of the tibia to the bottom-inside surface of the femur. The ligament prevents the knee joint from medial instability, that is, instability in the inside of the joint.
Review Date 6/29/2012
Updated by: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. C. Benjamin Ma, MD, Assistant Professor, Chief, Sports Medicine and Shoulder Service, UCSF Department of Orthopaedic Surgery. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.