• Daniel Pereira Maurício de Barros, RibeiroElayne Cristina de OliveiraECONúcleo de Estudos e Pesquisas em Imaginologia, Federal University of Paraiba, João Pessoa, Brazil; Department of Morphology, Federal ... more University of Paraiba, João Pessoa, Brazil., NascimentoJosé Jailson Costa doJJCDNúcleo de Estudos e Pesquisas em Imaginologia, Federal University of Paraiba, João Pessoa, Brazil; Department of Human Anatomy, Federal University of Pernambuco, Recife, Brazil., Silva-NetoEulâmpio José daEJDNúcleo de Estudos e Pesquisas em Imaginologia, Federal University of Paraiba, João Pessoa, Brazil; Department of Morphology, Federal University of Paraiba, João Pessoa, Brazil., and Araújo-NetoSeverino Aires deSANúcleo de Estudos e Pesquisas em Imaginologia, Federal University of Paraiba, João Pessoa, Brazil; Department of Internal Medicine, Federal University of Paraiba, João Pessoa, Brazil.. less
• Department of Neurosurgery, Galeão Air Force Hospital, Rio de Janeiro, Brazil; Núcleo de Estudos e Pesquisas em Imaginologia, Federal University of Paraiba, João Pessoa, Brazil. Electronic address: daniel.... more barros@academico.ufpb.br. less
• World Neurosurg. 2024 Jul 1; 187: e832e838e832-e838.

ObjectiveWe compared the diameter of the jugular foramen (JF) between normal individuals and those with a diagnosis of craniovertebral junction abnormalities, such as Chiari malformation type I (CMI) and/or basilar invagination (BI).MethodsThis cross-sectional analytical study measured the diameter of the right and left JF on magnetic resonance imaging scans of patients divided into 4 groups: 68 with combined CMI and BI (CMI+BI), 42 with isolated BI, 45 with isolated CMI, and 102 control cases. The t test determined sex differences, and univariate analysis of variance with Tukey's post hoc test assessed JF differences between groups.ResultsConsidering all combinations of laterality and sex, the CMI+BI group had a JF narrower than their respective control groups. The JF was bilaterally narrower in the BI group than in the control group only in the women. Regardless of laterality, the CMI group had a wider JF than did the CMI+BI group in men and did not differ from that of the control group. In the female patients with CMI, the right JF did not differ from that of the controls and was wider than that in the CMI+BI group. Also, the left JF was narrower than that in the control group and did not differ from that in the CMI+BI group.ConclusionsJF narrowing is associated with CMI and BI when combined in the same patient. When CMI or BI are detected separately, they do not imply evident changes in JF morphometry. It is expected that these findings could bring empiric substrate to support theories that claim a possible role of intracranial pressure disturbances as a triggering factor for CMI.Copyright © 2024 Elsevier Inc. All rights reserved.

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