Case ReportsTibial Post Fracture After Total Knee Arthroplasty: Ultrasound as a Viable Diagnostic Tool A Case ReportMichaels, Ross MD1,a; Muscatelli, Stefano MD1; McHugh, Michael MD1; Lewno, Adam MD2; Urquhart, Andrew MD1 Author Information 1Department of Orthopedic Surgery, Michigan Medicine, Ann Arbor, Michigan 2Department of Physical Medicine and Rehabilitation, Michigan Medicine, Ann Arbor, Michigan aE-mail address for R.E. Michaels: [email protected] Investigation performed at Michigan Medicine University Hospital and Clinics, Ann Arbor, MI Deemed exempted and nonregulated by University of Michigan IRB—HUM00210817. Disclosure: The Disclosure of Potential Conflicts of Interest forms are provided with the online version of the article (https://links.lww.com/JBJSCC/B988). JBJS Case Connector 12(4):e22.00461, October-December 2022. | DOI: 10.2106/JBJS.CC.22.00461 Buy Metrics Abstract Case: A 60-year-old woman presented with knee instability and pain that started approximately 13 years after a posterior stabilized total knee arthroplasty. Physical examination revealed significant posterior laxity. Bedside ultrasound (US) documented a free-floating, hyperechoic linear artifact within the posterior knee joint capsule. Revision with liner of increased thickness alleviated presenting symptoms. Conclusion: Tibial postfractures often present with instability and pain. Diagnosis of a tibial postfracture can be based on clinical examination; other diagnostics commonly used include arthroscopy or computed tomography/magnetic resonance imaging. US by a qualified sonographer is a potential diagnostic route that should be explored more rigorously. Copyright © 2022 by The Journal of Bone and Joint Surgery, Incorporated
