{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T23:24:58Z","timestamp":1780701898986,"version":"3.54.1"},"reference-count":4,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\nBackground:<\/jats:title>\nExtensive studies have been performed about the synovial cyst and intraspinal extradural ganglion cyst. Here, we describe a new type of the cyst with entirely different histological characteristics, which we are now calling a \u201cSpontaneous Degenerative Epidural Cyst.\u201d<\/jats:p>\n<\/jats:sec>\n\nCase Description:<\/jats:title>\nA 74-year-old male presented with low back pain, bilateral lower extremity radiculopathy, and a cauda equina syndrome. He exhibited a partial left foot drop (Grade 3\/5) and hypoesthesia in the sacral region. The magnetic resonance imaging (MRI) showed two cysts at the L4\u2013L5 level; Cyst I was in the left foramen and Cyst II was within the epidural space between the dura and ligamentum flavum. Cyst I was removed through an endoscopic transforaminal approach; it originated from the left facet joint and with synovial lining was confirmed to be a synovial cyst. Cyst II required an endoscopic interlaminar approach, and pathology revealed granulation tissue with micro-calcification, woven bone formation, hemosiderin pigment, and focal cystic change consistent with our designation \u201cSpontaneous Degenerative Epidural Cyst.\u201d<\/jats:p>\n<\/jats:sec>\n\nConclusion:<\/jats:title>\n\u201cSpontaneous Degenerative Epidural cyst\u201d should be considered among the differential diagnostic consideration for the different lumbar cysts. High-resolution MRI is the most useful in diagnosing these lesions, while full endoscopic treatment provides for adequate resection of these lesions.<\/jats:p>\n<\/jats:sec>","DOI":"10.25259\/sni-175-2019","type":"journal-article","created":{"date-parts":[[2019,5,2]],"date-time":"2019-05-02T08:37:26Z","timestamp":1556786246000},"page":"58","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Full endoscopic treatment of unusual spontaneous degenerative epidural cyst: A case report"],"prefix":"10.25259","volume":"10","author":[{"given":"Hyeun-Sung","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravindra","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nitin","family":"Adsul","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"},{"name":"Department of Spine Surgery, Sir Ganga Ram Hospital, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung-Soo","family":"Bang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang-Hwang","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"},{"name":"Medical School, University of Debrecen, Debrecen, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Il-Tae","family":"Jang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10894","published-online":{"date-parts":[[2019,4,24]]},"reference":[{"key":"10.25259\/SNI-175-2019\/ref-1","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1177\/197140091302600212","article-title":"Vacuum epidural cyst with acute neurological presentation. A case report","volume":"26","author":"El Beltagi","year":"2013","journal-title":"Neuroradiol J"},{"key":"10.25259\/SNI-175-2019\/ref-2","doi-asserted-by":"crossref","first-page":"322","DOI":"10.1016\/j.crad.2007.05.020","article-title":"MRI of degenerative cysts of the lumbar spine","volume":"63","author":"Khalatbari","year":"2008","journal-title":"Clin Radiol"},{"key":"10.25259\/SNI-175-2019\/ref-3","doi-asserted-by":"crossref","first-page":"774","DOI":"10.3171\/jns.1974.40.6.0774","article-title":"Spinal epidural cyst:Theories of pathogenesis. Case report","volume":"40","author":"Lake","year":"1974","journal-title":"J Neurosurg"},{"key":"10.25259\/SNI-175-2019\/ref-4","doi-asserted-by":"crossref","first-page":"e17","DOI":"10.4081\/or.2009.e17","article-title":"Degenerative intraspinal cyst of the cervical spine","volume":"1","author":"Nojiri","year":"2009","journal-title":"Orthop Rev (Pavia)"}],"container-title":["Surgical Neurology International"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/surgicalneurologyint.com\/full-endoscopic-treatment-of-unusual-spontaneous-degenerative-epidural-cyst-a-case-report\/","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/full-endoscopic-treatment-of-unusual-spontaneous-degenerative-epidural-cyst-a-case-report\/","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,8,25]],"date-time":"2019-08-25T12:02:45Z","timestamp":1566734565000},"score":1,"resource":{"primary":{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/full-endoscopic-treatment-of-unusual-spontaneous-degenerative-epidural-cyst-a-case-report\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,4,24]]},"references-count":4,"alternative-id":["10.25259\/SNI-175-2019"],"URL":"https:\/\/doi.org\/10.25259\/sni-175-2019","relation":{},"ISSN":["2152-7806"],"issn-type":[{"value":"2152-7806","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,4,24]]},"article-number":"58"}}