Knee Surg Relat Res 2019 Mar; 31(1): 72-75
Irreducible Knee Dislocation with Vastus Medialis Muscle Interposition
Wazzan Al-Juhani, MD, FRCSC1,2, Bander Ahmed, MD1, and Turki AlMugren, MD1
1Department of Surgery, King Abdulaziz Medical City, Riyadh; 2King Abdullah International Medical Research Center’s (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
Correspondence to: Wazzan Al-Juhani, MD, FRCSC Division of Orthopedic Surgery, Department of Surgery, King Abdulaziz Medical City & King Saud Bin Abdalaziz University for Health Sciences, National Guard Health Affairs, 2682 Ar Rimayah, Riyadh 14611, Saudi Arabia Tel: +966-11-8011111, Fax: +966-11-8015700 E-mail:
Received: August 13, 2018; Revised: December 21, 2018; Accepted: December 28, 2018; Published online: March 1, 2019.
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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Knee dislocation is one of the rare orthopedic emergencies that require special management with an annual incidence rate of less than 0.02%.Knee dislocations are classified by Kennedy, according to the direction of tibial dislocation in relation to the femur, as anteromedial, posteromedial, anterolateral, and posterolateral. Operative intervention and multi-ligament reconstruction are usually required in knee dislocation. Interposition of the vastus medialis inside the joint of a dislocated knee is an uncommon scenario where reduction becomes impossible. In this report, we present a case of irreducible knee dislocation with vastus medialis muscle interposition. Before reduction, we performed arthroscopy of the knee and removal of the interposed muscle to prevent extravasation of the fluid by sealing the torn capsular area.
Keywords: Knee, Dislocation, Vastus medialis, Interposition


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