{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T11:06:58Z","timestamp":1770462418902,"version":"3.49.0"},"reference-count":34,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"23","license":[{"start":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T00:00:00Z","timestamp":1638748800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,12,6]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND<\/jats:title>\n                    <jats:p>The authors analyzed the pre- and postoperative morphometric properties of pediatric patients with complex Chiari malformation undergoing occipitocervical fusion (OCF) to assess clinical outcomes and morphometric properties that might influence postoperative outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>OBSERVATIONS<\/jats:title>\n                    <jats:p>The authors retrospectively reviewed 35 patients younger than 22 years with Chiari malformation who underwent posterior fossa decompression and OCF with or without endoscopic endonasal odontoidectomy at their institution (13 with and 22 without odontoidectomy). Clivo-axial angle (CXA), pB-C2, atlantodental interval, basion-dens interval, basion-axial interval, and canal diameter at the level of C1 were measured on preoperative and approximately 3-month postoperative computed tomography or magnetic resonance imaging. The authors further stratified the patient cohort into three age groups and compared the three cohorts. The most common presenting symptoms were headache, neck\/shoulder pain, and dysphagia; 80% of the cohort had improved clinical outcomes. CXA increased significantly after surgery. When stratified into those who showed postoperative improvement and those who did not, only the former showed a significant increase in CXA. After age stratification, the significant changes in CXA were observed in the 7- to 13-year-old and 14- to 21-year-old cohorts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>LESSONS<\/jats:title>\n                    <jats:p>CXA may be the most important morphometric predictor of clinical outcomes after OCF in pediatric patients with complex Chiari malformation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/case21433","type":"journal-article","created":{"date-parts":[[2021,12,6]],"date-time":"2021-12-06T02:05:37Z","timestamp":1638756337000},"source":"Crossref","is-referenced-by-count":5,"title":["Increase in clivo-axial angle is associated with clinical improvement in children undergoing occipitocervical fusion for complex Chiari malformation: patient series"],"prefix":"10.3171","volume":"2","author":[{"given":"Neelan J.","family":"Marianayagam","sequence":"first","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John K.","family":"Chae","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ibrahim","family":"Hussain","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amanda","family":"Cruz","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ali A.","family":"Baaj","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, University of Arizona College of Medicine, Phoenix, Arizona"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roger","family":"H\u00e4rtl","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeffrey P.","family":"Greenfield","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Weill Cornell Medicine\/NewYork-Presbyterian Hospital, New York, New York; and"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"6","key":"b1","series-title":"Pediatr Neurol","doi-asserted-by":"publisher","first-page":"449","DOI":"10.1016\/j.pediatrneurol.2009.01.003","article-title":"Chiari type I malformation in a pediatric population","volume":"40","author":"Aitken LA","year":"2009","unstructured":"Aitken LA, Lindan CE, Sidney S,  Chiari type I malformation in a pediatric population. 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