Case ReportsClinical and Anatomical Considerations for Management of a Complete Tear of the Distal Rectus Femoris Myotendinous Junction A Rare Knee Extensor Mechanism InjuryHolder, Eric K. MD; Rose, Alysha BScHon; Haims, Andrew MDAuthor Information From the Section of Physiatry, Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut (EKH); Yale School of Medicine, New Haven, Connecticut (AR); and Division of MSK Imaging, Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, Connecticut (AH). All correspondence should be addressed to: Eric K. Holder, MD, Section of Physiatry, Department of Orthopaedics and Rehabilitation, Yale School of Medicine, 47 College Street, New Haven, CT 06511. Alysha Rose is in training. Financial disclosure statements have been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article. Supplemental digital content is available for this article. Direct URL citations appear in the printed text and are provided in the HTML and PDF versions of this article on the journal’s Web site (www.ajpmr.com). American Journal of Physical Medicine & Rehabilitation: May 2021 - Volume 100 - Issue 5 - p e69-e72 doi: 10.1097/PHM.0000000000001559 Buy SDC Metrics Abstract The knee extensor mechanism is a highly complex multilayered and reinforced structure. Quadriceps muscle injuries are considered to be common, particularly among athletes; however isolated rectus femoris injuries involving the distal myotendinous junction are considered to be exceedingly rare with very few case reports published to date. Thus, the presentation and diagnosis of this injury can be elusive and treatment is nonuniform. There is limited literature published advocating both nonsurgical and surgical management. We illustrate the clinical and radiologic presentation of a traumatic, nonsport-related distal rectus femoris muscle injury treated operatively. The presentation of this injury along with anatomical and clinical considerations is portrayed in detail. This case report contributes to the sparse literature regarding this injury and delineates management considerations. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.