{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T17:01:07Z","timestamp":1775062867501,"version":"3.50.1"},"reference-count":25,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T00:00:00Z","timestamp":1775001600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Objectives: In this retrospective comparative cohort study, we aimed to compare surgical efficiency, radiographic facet integrity, and postoperative alignment and mobility between unilateral hemilaminectomy (UL) and laminotomy with laminoplasty (LP) for cervical intradural extramedullary (IDEM) tumors. Methods: Thirty-eight patients (UL: 20; LP: 18) were retrospectively reviewed. Operative variables, tumor characteristics, extent of resection, radiographic facet joint violation (graded 1\u20134), and sagittal alignment parameters, including global and segmental range of motion (ROM), were evaluated at 1 year postoperatively. Propensity score matching was additionally performed to minimize potential baseline imbalance between groups. Results: The UL group had significantly shorter operative time (178.05 \u00b1 61.89 vs. 276.06 \u00b1 121.76 min, p = 0.003) and lower intraoperative blood loss (p &lt; 0.001) than the LP group. Radiographic facet joint violation (Grade \u2265 2) occurred more frequently in the UL group (25.0% vs. 0%, p = 0.048) but was not associated with postoperative sagittal alignment changes or radiographic instability. Global cervical alignment remained in both groups, but the LP group showed a significantly greater reduction in segmental ROM at 1 year (\u22126.42 \u00b1 8.29\u00b0 vs. 0.06 \u00b1 7.72\u00b0, p = 0.017). These findings were consistent in the propensity score\u2013matched cohort. Conclusions: UL provides favorable operative efficiency and better preservation of segmental cervical mobility than LP, while maintaining comparable clinical and radiographic outcomes. Although radiographic facet joint violation was more frequent in the UL group, postoperative spinal stability was not compromised in this cohort. UL may serve as a safe and motion-preserving alternative in selected patients with cervical IDEM tumors.<\/jats:p>","DOI":"10.3390\/jcm15072672","type":"journal-article","created":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T14:59:01Z","timestamp":1775055541000},"page":"2672","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Sagittal Alignment and Segmental Mobility After Cervical Intradural Extramedullary Tumor Surgery: A Comparative Analysis of Unilateral Hemilaminectomy and Laminotomy with Laminoplasty"],"prefix":"10.3390","volume":"15","author":[{"given":"Jae Min","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Daejeon Woori Hospital, Daejeon 35262, Republic of Korea"},{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Seoul 06273, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9815-2720","authenticated-orcid":false,"given":"Yong Eun","family":"Cho","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Leon Wiltse Memorial Hospital, Suwon 16480, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3384-5638","authenticated-orcid":false,"given":"Keun Su","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Seoul 06273, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6063-3510","authenticated-orcid":false,"given":"Hyun Jun","family":"Jang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Seoul 06273, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1681-9734","authenticated-orcid":false,"given":"Bong Ju","family":"Moon","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Gangnam Severance Hospital, Yonsei University College of Medicine, 211 Eonju-ro, Seoul 06273, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jun Jae","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Yongin Severance Hospital, Yonsei University College of Medicine 363, Dongbaekjukjeon-daero, Yongin 16995, Republic of Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"701","DOI":"10.3171\/2013.9.SPINE12913","article-title":"Anatomical location dictating major surgical complications for intradural extramedullary spinal tumors: A 10-year single-institutional experience","volume":"19","author":"Mehta","year":"2013","journal-title":"J. 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