{"title":"Mini-open exoscopic surgery for C1 restenosis 7 years after decompression of Chiari malformation type 1 with atlas assimilation.","authors":"Yosuke Hashimoto, Hisaaki Uchikado, Yuko Baba, Takehiro Makizono, Jin Kikuchi, Motohiro Morioka","doi":"10.25259/SNI_480_2025","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>Chiari malformation type 1 (CM1) associated with atlas assimilation (AA) is rarely encountered in children without syringomyelia. Here, a 13-year-old child underwent an original foramen magnum decompression (FMD) for a CM1. Seven years after the index surgery, at age 20, the patient required secondary surgery to address recurrent C1 stenosis attributed to CM1/AA performed without a duraplasty.</p><p><strong>Case description: </strong>A 13-year-old child originally presented with headaches and CM1 and AA, for which he underwent a FMD without duraplasty. Seven years later, at the age of 20, he developed recurrent C1 stenosis attributed to dorsal bony proliferation of the lamina of the atlas. Following a secondary mini-open exoscopic decompression without duraplasty, he became asymptomatic.</p><p><strong>Conclusion: </strong>For patients with CM1 without syringomyelia, recurrent stenosis may be successfully managed with repeated mini-open exoscopic bony decompression.</p>","PeriodicalId":94217,"journal":{"name":"Surgical neurology international","volume":"16 ","pages":"294"},"PeriodicalIF":0.0000,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12361646/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surgical neurology international","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.25259/SNI_480_2025","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Background: Chiari malformation type 1 (CM1) associated with atlas assimilation (AA) is rarely encountered in children without syringomyelia. Here, a 13-year-old child underwent an original foramen magnum decompression (FMD) for a CM1. Seven years after the index surgery, at age 20, the patient required secondary surgery to address recurrent C1 stenosis attributed to CM1/AA performed without a duraplasty.
Case description: A 13-year-old child originally presented with headaches and CM1 and AA, for which he underwent a FMD without duraplasty. Seven years later, at the age of 20, he developed recurrent C1 stenosis attributed to dorsal bony proliferation of the lamina of the atlas. Following a secondary mini-open exoscopic decompression without duraplasty, he became asymptomatic.
Conclusion: For patients with CM1 without syringomyelia, recurrent stenosis may be successfully managed with repeated mini-open exoscopic bony decompression.