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The patient underwent urgent surgical decompression; however, he required a second surgery for further decompression as repeat MRI showed persistent stenosis with further extension. Intraoperative Doppler ultrasonography revealed an intradural lesion, which was surgically excised and found to be a sequestrated lumbar disc in the intrathecal space. The patient showed significant neurological improvement post revision decompression.<\/jats:p>","DOI":"10.1136\/bcr-2021-241983","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T13:00:39Z","timestamp":1620219639000},"page":"e241983","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Lumbar disc sequestration through the dura into the intrathecal space presenting as acute cauda equina"],"prefix":"10.1136","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9527-4324","authenticated-orcid":false,"given":"Thomas Robert William","family":"Ward","sequence":"first","affiliation":[{"name":"Trauma and Orthopaedics, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rajpreet","family":"Sahemey","sequence":"additional","affiliation":[{"name":"Trauma and Orthopaedics, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Sneath","sequence":"additional","affiliation":[{"name":"Trauma and Orthopaedics, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sandeep","family":"Solanki","sequence":"additional","affiliation":[{"name":"Neurosurgery, University Hospitals Coventry and Warwickshire NHS Trust, Coventry, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2021,5,5]]},"reference":[{"key":"2025082622374416000_14.5.e241983.1","doi-asserted-by":"publisher","DOI":"10.1007\/s00586-010-1668-3"},{"key":"2025082622374416000_14.5.e241983.2","doi-asserted-by":"crossref","first-page":"956","DOI":"10.1097\/00006123-199710000-00037","article-title":"Intraradicular lumbar disc herniation: case report and review of the literature","volume":"41","author":"S\u00fczer","year":"1997","journal-title":"Neurosurgery"},{"key":"2025082622374416000_14.5.e241983.3","doi-asserted-by":"crossref","first-page":"2295","DOI":"10.2147\/CIA.S228717","article-title":"Intradural lumbar disc herniation: a case report and literature review","volume":"14","author":"Ge","year":"2019","journal-title":"Clin Interv Aging"},{"key":"2025082622374416000_14.5.e241983.4","first-page":"389","article-title":"Intradural disc herniation - a case report","volume":"23","author":"Jain","year":"2013","journal-title":"Turk Neurosurg"},{"key":"2025082622374416000_14.5.e241983.5","doi-asserted-by":"crossref","DOI":"10.25259\/SNI_108_2020","article-title":"Intradural lumbar disc herniations at the L1-L2 level: a case study and literature review","volume":"11","author":"Ponzo","year":"2020","journal-title":"Surg Neurol Int"},{"key":"2025082622374416000_14.5.e241983.6","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.pjnns.2016.12.002","article-title":"Transdural herniated lumbar disc disease with muscle patch for closure of durotomy - A Brief review of literature","volume":"51","author":"Huliyappa","year":"2017","journal-title":"Neurol Neurochir Pol"},{"key":"2025082622374416000_14.5.e241983.7","doi-asserted-by":"crossref","first-page":"540","DOI":"10.1016\/j.wneu.2019.11.121","article-title":"Unexpected intradural lumbar disk herniation found during Transforaminal endoscopic surgery","volume":"134","author":"Moon","year":"2020","journal-title":"World Neurosurg"},{"key":"2025082622374416000_14.5.e241983.8","doi-asserted-by":"crossref","first-page":"514","DOI":"10.1097\/00000658-194204000-00004","article-title":"Recent advances in the diagnosis and treatment of ruptured intervertebral disks","volume":"115","author":"Dandy","year":"1942","journal-title":"Ann Surg"},{"key":"2025082622374416000_14.5.e241983.9","doi-asserted-by":"crossref","DOI":"10.1155\/2012\/949275","article-title":"Avoiding misdiagnosis in patients with neurological emergencies","volume":"2012","author":"Pope","year":"2012","journal-title":"Emerg Med Int"},{"key":"2025082622374416000_14.5.e241983.10","doi-asserted-by":"publisher","DOI":"10.3109\/02688697.2010.505987"},{"key":"2025082622374416000_14.5.e241983.11","unstructured":"Surgeons BAoS . 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