{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T03:28:52Z","timestamp":1777001332320,"version":"3.51.4"},"reference-count":10,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2025,1,16]]},"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:p>We present a unique case of a man in his 60s with a knee intra-articular loose body causing a compression neuropathy on his common peroneal (fibular) nerve (CPN). This neuropathy caused a reduction in function of his leg\u2019s motor function causing a foot drop. Through a strong clinical interview and focused clinical examination, the neuropathy was localised, and the diagnosis was reinforced through nerve conduction studies and imaging. The intra-articular loose body was surgically excised after the careful isolation and decompression of the peroneal nerve. This resulted in a marked improvement in the patient\u2019s motor function and symptoms, allowing him to ambulate and return to normal function. To our knowledge, this is the first case report of an intra-articular loose body in the knee causing a compression CPN neuropathy with symptoms such as foot drop. We hope this case report aids in guiding management should physicians come across this issue in the future.<\/jats:p>","DOI":"10.1136\/bcr-2024-262880","type":"journal-article","created":{"date-parts":[[2025,1,31]],"date-time":"2025-01-31T12:05:56Z","timestamp":1738325156000},"page":"e262880","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Knee intra-articular loose body causing a compression common peroneal nerve neuropathy with foot drop"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-0298-8255","authenticated-orcid":false,"given":"Mustafa","family":"Fakih","sequence":"first","affiliation":[{"name":"Medicine, McGill University, Montreal, Qu\u00e9bec, Canada"},{"name":"Orthopedic Surgery, McGill University Health Centre, Montreal, Qu\u00e9bec, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Khalifa","family":"Alhojailan","sequence":"additional","affiliation":[{"name":"Orthopedic Surgery, McGill University Health Centre, Montreal, Qu\u00e9bec, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Monika","family":"Volesky","sequence":"additional","affiliation":[{"name":"Orthopedic Surgery, McGill University Health Centre, Montreal, Qu\u00e9bec, Canada"},{"name":"Orthopedic Surgery, Jewish General Hospital, Montreal, Qu\u00e9bec, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,1,31]]},"reference":[{"key":"2025082722461717000_18.1.e262880.1","doi-asserted-by":"crossref","DOI":"10.52965\/001c.24937","article-title":"An Update on Peroneal Nerve Entrapment and Neuropathy","volume":"13","author":"Fortier","year":"2021","journal-title":"Orthop Rev (Pavia)"},{"key":"2025082722461717000_18.1.e262880.2","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1016\/B978-0-444-52902-2.00019-9","article-title":"Compression and entrapment neuropathies","volume":"115","author":"Bouche","year":"2013","journal-title":"Handb Clin Neurol"},{"key":"2025082722461717000_18.1.e262880.3","doi-asserted-by":"crossref","DOI":"10.1177\/2325967117706521","article-title":"Demographics and Injuries Associated With Knee Dislocation: A Prospective Review of 303 Patients","volume":"5","author":"Moatshe","year":"2017","journal-title":"Orthop J Sports Med"},{"key":"2025082722461717000_18.1.e262880.4","doi-asserted-by":"publisher","DOI":"10.1016\/j.pmr.2012.08.016"},{"key":"2025082722461717000_18.1.e262880.5","doi-asserted-by":"crossref","first-page":"632","DOI":"10.1053\/j.jfas.2017.10.035","article-title":"Bilateral Common Peroneal Nerve Entrapment After Excessive Weight Loss: Case Report and Review of the Literature","volume":"57","author":"Margulis","year":"2018","journal-title":"J Foot Ankle Surg"},{"key":"2025082722461717000_18.1.e262880.6","doi-asserted-by":"crossref","first-page":"402","DOI":"10.5606\/tftrd.2024.11968","article-title":"Posture-induced compressive peroneal neuropathy during harvesting season: A case series","volume":"70","author":"Sar\u0131y\u0131ld\u0131z","year":"2024","journal-title":"Turk J Phys Med Rehabil"},{"key":"2025082722461717000_18.1.e262880.7","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1007\/s00590-016-1845-0","article-title":"Peroneal nerve palsy after ankle sprain: an update","volume":"27","author":"Mitsiokapa","year":"2017","journal-title":"Eur J Orthop Surg Traumatol"},{"key":"2025082722461717000_18.1.e262880.8","doi-asserted-by":"publisher","DOI":"10.1007\/s00415-019-09319-8"},{"key":"2025082722461717000_18.1.e262880.9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.5435\/JAAOS-D-14-00420","article-title":"Peroneal Nerve Palsy: Evaluation and Management","volume":"24","author":"Poage","year":"2016","journal-title":"J Am Acad Orthop Surg"},{"key":"2025082722461717000_18.1.e262880.10","doi-asserted-by":"crossref","unstructured":"Patel A , Singh R , Johnson B , et al . Compression neuropathy of the common peroneal nerve by the fabella. BMJ Case Rep 2013;2013. doi:10.1136\/bcr-2013-202154","DOI":"10.1136\/bcr-2013-202154"}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr-2024-262880","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,28]],"date-time":"2025-08-28T05:46:23Z","timestamp":1756359983000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr-2024-262880"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,1]]},"references-count":10,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2025,1,31]]},"published-print":{"date-parts":[[2025,1]]}},"alternative-id":["10.1136\/bcr-2024-262880"],"URL":"https:\/\/doi.org\/10.1136\/bcr-2024-262880","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,1]]}}}