29-year-old F presents to ED with acute onset knee pain. Reports hearing an audible “pop” after twisting her leg while running down the stairs at home. She explains that her right knee is stuck, and she can neither flex nor extend it. An image is shown below (courtesy of Andrew Murphy, Radiopaedia.org)
References & Resources:
Looking to brush up on knee imaging? Check out the EMRad Archives.
- Agel, J., Rockwood, T., Klossner, D. Collegiate ACL Injury Rates Across 15 Sports: National Collegiate Athletic Association Injury Surveillance System Data Update (2004-2005 Through 2012-2013). Clin J Sport Med. 2016;26(6):518-523. PMID: 27315457
- Fabricant, P. and Jokl, P. Surgical Outcomes After Arthroscopic Partial Meniscectomy. Journal of the American Academy of Orthopaedic Surgeons. 2007;15(11), pp.647-653. PMID: 17989415
- Mohd Miswan, M. F., Latiff Alsagoff, S., Muhamad Effendi, F., & Ibrahim, M. I. The unusual traumatic locked young knee. Malaysian family physician: the official journal of the Academy of Family Physicians of Malaysia. 2019;14(2), 26–28. PMID: 31827732
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