{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T01:51:59Z","timestamp":1782352319984,"version":"3.54.5"},"reference-count":39,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2022,3,24]],"date-time":"2022-03-24T00:00:00Z","timestamp":1648080000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Diagnostics"],"abstract":"<jats:p>Objective: There is limited literature on repetitive postoperative MRI and clinical evaluation after Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression. Methods: Clinical visual analog scale, Oswestry Disability Index, McNab\u2019s criteria evaluation and MRI evaluation of the axial cut spinal canal area of the upper end plate, mid disc and lower end plate were performed for patients who underwent single-level Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression. From the evaluation of the axial cut MRI, four types of patterns of remodeling were identified: type A: continuous expanded spinal canal, type B: restenosis with delayed expansion, type C: progressive expansion and type D: restenosis. Result: A total of 126 patients with single-level Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression were recruited with a minimum follow-up of 26 months. Thirty-six type A, fifty type B, thirty type C and ten type D patterns of spinal canal remodeling were observed. All four types of patterns of remodeling had statistically significant improvement in VAS at final follow-up compared to the preoperative state with type A (5.59 \u00b1 1.58), B (5.58 \u00b1 1.71), C (5.58 \u00b1 1.71) and D (5.27 \u00b1 1.68), p &lt; 0.05. ODI was significantly improved at final follow-up with type A (49.19 \u00b1 10.51), B (50.00 \u00b1 11.29), C (45.60 \u00b1 10.58) and D (45.60 \u00b1 10.58), p &lt; 0.05. A significant MRI axial cut increment of the spinal canal area was found at the upper endplate at postoperative day one and one year with type A (39.16 \u00b1 22.73; 28.00 \u00b1 42.57) mm2, B (47.42 \u00b1 18.77; 42.38 \u00b1 19.29) mm2, C (51.45 \u00b1 18.16; 49.49 \u00b1 18.41) mm2 and D (49.10 \u00b1 23.05; 38.18 \u00b1 18.94) mm2, respectively, p &lt; 0.05. Similar significant increment was found at the mid-disc at postoperative day one, 6 months and one year with type A (55.16 \u00b1 27.51; 37.23 \u00b1 25.88; 44.86 \u00b1 25.73) mm2, B (72.83 \u00b1 23.87; 49.79 \u00b1 21.93; 62.94 \u00b1 24.43) mm2, C (66.85 \u00b1 34.48; 54.92 \u00b1 30.70; 64.33 \u00b1 31.82) mm2 and D (71.65 \u00b1 16.87; 41.55 \u00b1 12.92; 49.83 \u00b1 13.31) mm2 and the lower endplate at postoperative day one and one year with type A (49.89 \u00b1 34.50; 41.04 \u00b1 28.56) mm2, B (63.63 \u00b1 23.70; 54.72 \u00b1 24.29) mm2, C (58.50 \u00b1 24.27; 55.32 \u00b1 22.49) mm2 and D (81.43 \u00b1 16.81; 58.40 \u00b1 18.05) mm2 at postoperative day one and one year, respectively, p &lt; 0.05. Conclusions: After full endoscopic lumbar decompression, despite achieving sufficient decompression immediately postoperatively, varying severity of asymptomatic restenosis was found in postoperative six months MRI without clinical significance. Further remodeling with a varying degree of increment of the spinal canal area occurs at postoperative one year with overall good clinical outcomes.<\/jats:p>","DOI":"10.3390\/diagnostics12040793","type":"journal-article","created":{"date-parts":[[2022,3,25]],"date-time":"2022-03-25T00:05:18Z","timestamp":1648166718000},"page":"793","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Remodeling Pattern of Spinal Canal after Full Endoscopic Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression: One Year Repetitive MRI and Clinical Follow-Up Evaluation"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5361-5234","authenticated-orcid":false,"given":"Hyeun-Sung","family":"Kim","sequence":"first","affiliation":[{"name":"Spine Surgery, Nanoori Gangnam Hospital, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pang-Hung","family":"Wu","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Juronghealth Campus, National University Health System, Singapore 609606, Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5362-0092","authenticated-orcid":false,"given":"Giovanni","family":"Grasso","sequence":"additional","affiliation":[{"name":"Neurosurgical Clinic, Department of Biomedicine, Neurosciences and Advanced Diagnostics University for Palermo, 90127 Palermo, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin-Woo","family":"An","sequence":"additional","affiliation":[{"name":"Nanoori Spine and Joint Clinic with Saudi German Hospital in Dubai, Dubai 66566, United Arab Emirates"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Myeonghun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Inkyung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jong-Seon","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun-Hyoung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangsoo","family":"Kang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeongshik","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yeonjin","family":"Yi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun-Hyung","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun-Hwan","family":"Park","sequence":"additional","affiliation":[{"name":"The Faculty of Medicine, University of Debrecen, Nagyerdei krt. 94, 4032 Debrecen, Hungary"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jae-Hyeon","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Il-Tae","family":"Jang","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Nanoori Hospital Gangnam, Seoul 06048, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6","DOI":"10.14245\/ns.1836322.161","article-title":"Evolution of Spinal Endoscopic Surgery","volume":"16","author":"Kim","year":"2019","journal-title":"Neurospine"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"S3","DOI":"10.14245\/ns.2040188.094","article-title":"Development of Endoscopic 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