{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T07:11:48Z","timestamp":1790838708214,"version":"4.1.0"},"reference-count":41,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["SPI"],"published-print":{"date-parts":[[2009,7]]},"abstract":"<jats:sec>\n<jats:title>Object<\/jats:title>\n<jats:p>In this study the authors evaluated disease incidence, treatment, and outcome in patients with unusual sequestered disc fragments simulating spinal tumors or another space-occupying lesion on preoperative MR imaging.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Methods<\/jats:title>\n<jats:p>The authors retrospectively reviewed data from the last 3000 patients with a histological diagnosis of disc herniation. Patients with preoperative MR imaging findings that simulated a spinal tumor or other spaceoccupying lesion were individually analyzed.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Results<\/jats:title>\n<jats:p>In 11 patients (0.4%), MR imaging findings of unusual sequestered disc fragments were mistaken for another spinal space-occupying lesion. In 8 cases, the fragments had migrated to the posterior spinal space; in 3 cases, into the dural sac. In 3 patients, the fragments were distant from the original disc space. A heterogeneous mass was revealed with low-intensity or isointense signal on T1-weighted MR images as well as low signal (4 cases) or high signal (7 cases) intensity on T2-weighted images, relative to the spinal structures. A slight diffuse or peripheral Gd enhancement rim was observed in 7 patients. Disc fragments were located in the cervical (1 patient), thoracic (2 patients), and lumbar (8 patients) spine. All lesions were completely removed. Discectomy was required in 4 patients. A complete recovery occurred in 8 patients and a minor neurological deficit remained in 3.<\/jats:p><\/jats:sec>\n<jats:sec>\n<jats:title>Conclusions<\/jats:title>\n<jats:p>Atypically located disc herniations should be considered in the differential diagnosis in patients with MR imaging data indicating spinal space-occupying disorders. All of these lesions, even those intradurally located, can be completely removed.<\/jats:p><\/jats:sec>","DOI":"10.3171\/2009.3.spine08161","type":"journal-article","created":{"date-parts":[[2009,7,1]],"date-time":"2009-07-01T17:28:30Z","timestamp":1246469310000},"page":"42-48","source":"Crossref","is-referenced-by-count":36,"title":["Unusual sequestered disc fragments simulating spinal tumors and other space-occupying lesions"],"prefix":"10.3171","volume":"11","author":[{"given":"Mario Nazareno Carviy","family":"Nievas","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hans-Georg","family":"Hoellerhage","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1-0110042","series-title":"Neurosurgery","first-page":"673","article-title":"Intraradicular disc herniation","volume":"19","author":"Acikg\u00f6z","year":"1986"},{"key":"b2-0110042","series-title":"Neurosurg Rev","doi-asserted-by":"publisher","first-page":"71","DOI":"10.1007\/BF01390531","article-title":"Postoperative intraradicular lumbar disc herniation","volume":"20","author":"Akdemir","year":"1997"},{"key":"b3-0110042","series-title":"Spinal Cord","doi-asserted-by":"publisher","first-page":"52","DOI":"10.1038\/sj.sc.3101476","article-title":"Intradural disc mimicking: a spinal tumor lesion","volume":"42","author":"Aydin","year":"2004"},{"key":"b4-0110042","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"858","DOI":"10.3171\/jns.1984.60.4.0858","article-title":"Intraradicular herniated lumbar disc: case report","volume":"60","author":"Barbera","year":"1984"},{"key":"b5-0110042","series-title":"J Neurosurg","doi-asserted-by":"publisher","first-page":"676","DOI":"10.3171\/jns.1969.31.6.0676","article-title":"Intradural herniated lumbar disc","volume":"31","author":"Blikra","year":"1969"},{"key":"b6-0110042","series-title":"Spine","doi-asserted-by":"publisher","first-page":"378","DOI":"10.1097\/00007632-199802010-00018","article-title":"Posterior epidural migration of an extruded lumbar disc fragment causing cauda equina syndrome. 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