Case ReportFibularis Intersection Syndrome A Rare Cause of Lateral Foot Pain in RunnersMonsour, Marc MD, FRCPC; Sangha, Harpreet MD, FRCPC; Farag, Jordan MD, FRCPC (Cand); Mittal, Nimish MBBS, MD, MScAuthor Information From the Division of Physical Medicine and Rehabilitation, Department of Medicine, University of Toronto, Toronto, Ontario, Canada (MM, HS, NM); University Health Network-Toronto Rehabilitation Institute, Toronto, Ontario, Canada (MM, HS); Division of Physical Medicine and Rehabilitation, University of British Columbia, Vancouver, British Columbia, Canada (JF); and University Health Network-Toronto Rehabilitation Institute and Toronto General Hospital, Toronto, Ontario, Canada (NM). All correspondence should be addressed to: Nimish Mittal, MBBS, MD, MSc, University of Toronto, 190 Elizabeth St, Toronto, Ontario, Canada M5G 2C4. MM, HS, JF, and NM helped design the study, conduct the study, analyze the data, and write the manuscript. MM, HS, JF, and NM participated in the conception of the review, acquisition, analysis, interpretation of data, and drafting the manuscript. Jordan Farag 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: February 2021 - Volume 100 - Issue 2 - p e19-e21 doi: 10.1097/PHM.0000000000001509 Buy SDC Metrics Abstract Running is a common cause of foot and ankle injuries. Accurate diagnosis is important for appropriate management to resolve the issue. For clarity of diagnoses, the physician should be able to perform a thorough physical examination in conjunction with point-of-care ultrasound. The authors report a case study of a young male runner with lateral ankle pain. Based on clinical assessment and point-of-care ultrasound, a diagnosis of fibularis intersection syndrome was proposed. This type of injury can be treated with graded eccentric loading of fibularis tendons and proprioceptive exercises. This case report highlights the importance of point-of-care ultrasound to determine the appropriate diagnosis and management. Copyright © 2020 Wolters Kluwer Health, Inc. All rights reserved.