Review ArticlesManagement of Chronic Combined ACL Medial Posteromedial Instability of the KneeJiang, Kevin N. MD*; West, Robin V. MD†,‡Author Information *Orthopaedic Sports Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA †Inova Sports Medicine Institute, Falls Church ‡Virginia Commonwealth, University, School of Medicine—Inova Campus, Richmond, VA Disclosure: The authors declare no conflict of interest. Reprints: Robin V. West, MD, Inova Sports Medicine Institute, 8110 Gatehouse Road, Suite 300, West TowerFalls Church, VA, 22042. Sports Medicine and Arthroscopy Review: June 2015 - Volume 23 - Issue 2 - p 85-90 doi: 10.1097/JSA.0000000000000056 Buy Metrics Abstract The medial collateral ligament is the most commonly injured ligament in the knee. High-grade medial collateral injuries are associated with injuries to the posteromedial structures of the knee. Chronic medial-sided instability is rare due to the intrinsic capacity of the medial ligamentous structures to heal. However, when combined with anterior cruciate ligament deficiency, significant anterior, valgus, and rotatory laxity of the knee occurs. In this review, we discuss the important biomechanical, clinical, and surgical considerations in the management of chronic combined anterior cruciate ligament, medial, and posteromedial instability of the knee. Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.