{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T18:16:40Z","timestamp":1793297800766,"version":"4.5.0"},"reference-count":32,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2014,11,17]],"date-time":"2014-11-17T00:00:00Z","timestamp":1416182400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Global Spine Journal"],"published-print":{"date-parts":[[2015,2]]},"abstract":"<jats:sec>\n                    <jats:title>Study Design<\/jats:title>\n                    <jats:p>Case series.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>Posterior percutaneous endoscopic cervical diskectomy (PECD) can preserve the disk in patients with a foraminal disk herniation. However, progressive angulation at the operated segment is a concern, especially for patients with cervical lordosis\u2009&lt;\u200910 degrees. The change in cervical lordosis after posterior PECD was analyzed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Medical records were reviewed of 32 consecutive patients (22 men, 10 women; mean age, 49\u2009\u00b1\u200912 years) who had single-level foraminal soft disk herniation. The operation levels were as follows: C4\u20135 in 1 patient, C5\u20136 in 12, C6\u20137 in 18, and C7\u2013T1 in 1. All patients were discharged the day after the operation, and neck motion was encouraged. All patients were followed for 30\u2009\u00b1\u20097 months (range, 24 to 46 months), and 21\/32 patients (66%) had radiographs taken at 25\u2009\u00b1\u200911 months (range, 12 to 45 months). Radiologic parameters were assessed, including cervical curvature (C2\u20137), segmental Cobb's angle (SA), and anterior and posterior disk height (AH and PH, respectively) at the operative level.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>At the last follow-up, 29\/32 patients (91%) had no or minimal pain, and 3\/32 patients had occasional pain. SA, AH, and PH were not significantly changed. Cervical lordosis\u2009&lt;\u200910 degrees was present in 10\/21 patients preoperatively and in 3\/21 patients at the last follow-up. For patients with cervical lordosis\u2009&lt;\u200910 degrees, cervical curvature changed from \u22122.5\u2009\u00b1\u20098.0 to \u221211.3\u2009\u00b1\u20099.3 degrees ( p\u2009=\u20090.01). For patients with cervical lordosis\u2009\u2265\u200910 degrees, cervical curvature changed from \u221217.5\u2009\u00b1\u20095.8 to \u221219.9\u2009\u00b1\u20095.7 degrees ( p\u2009=\u20090.24).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Cervical curvature does not worsen after posterior PECD.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1055\/s-0034-1395423","type":"journal-article","created":{"date-parts":[[2014,11,17]],"date-time":"2014-11-17T18:35:22Z","timestamp":1416249322000},"page":"31-38","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":60,"title":["Changes in Cervical Sagittal Alignment after Single-Level Posterior Percutaneous Endoscopic Cervical Diskectomy"],"prefix":"10.1177","volume":"5","author":[{"given":"Chi Heon","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea"},{"name":"Department of Neurosurgery, Seoul National University Hospital, Seoul, South Korea"},{"name":"Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kyung-Hyun","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery, Shin Hospital, Kyung-Gi, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chun Kee","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea"},{"name":"Department of Neurosurgery, Seoul National University Hospital, Seoul, South Korea"},{"name":"Clinical Research Institute, Seoul National University Hospital, Seoul, South Korea"},{"name":"Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sung Bae","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea"},{"name":"Department of Neurosurgery, Seoul National University Boramae Hospital, Seoul, South Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jung Hee","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Seoul National University College of Medicine, Seoul, South Korea"},{"name":"Department of Neurosurgery, Seoul National University Hospital, Seoul, South Korea"},{"name":"Clinical Research Institute, Seoul National University Hospital, Seoul, South 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