J S Rosenblum1,2, J M Tunacao3, V Chandrashekhar4, A Jha5, M Neto6, C Weiss3, J Smirniotopoulos7,8, B R Rosenblum9, J D Heiss10. 1. Surgical Neurology Branch (J.S.R., J.D.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland Jared.rosenblum@nih.gov. 2. Neuro-Oncology Branch (J.S.R.), National Cancer Institute, National Institutes of Health, Bethesda, Maryland. 3. Department of Radiology and Radiological Science (J.M.T., C.W.), The Johns Hopkins University School of Medicine, Baltimore, Maryland. 4. SmartSulis LLC (V.C.), Trabuco Canyon, California. 5. Section on Medical Neuroendocrinology (A.J.), Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland. 6. Department of Neurosurgery (M.N.), Hospital Beneficência Portuguesa de São Paulo, Institute of Neurological Science of São Paulo Bela Vista, São Paulo, Brazil. 7. Department of Radiology (J.S.), George Washington University, Washington, DC. 8. MedPix® (J.S.), National Library of Medicine, Bethesda, Maryland. 9. Department of Neurosurgery (B.R.R.), Riverview Medical Center, Red Bank, New Jersey. 10. Surgical Neurology Branch (J.S.R., J.D.H.), National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland.
Abstract
BACKGROUND AND PURPOSE: A new transtentorial venous system consisting of medial, intermediate, and lateral tentorial veins, connecting infra- and supratentorial compartments, was recently shown in 2 cadaver dissections and 2 patient scans. We sought to characterize the venous patterns within the tentorium and their relation to measures of skull development in a cohort of healthy adults. MATERIALS AND METHODS: We retrospectively reviewed tentorial venous anatomy of the head using CTA/CTV performed for routine care or research purposes in 238 patients. Included studies had adequate contrast opacification of venous structures and a section thickness of ≤2 mm; we excluded cases with space-occupying lesions and vascular pathologies. Tentorial angle, dural sinus configurations, and measures of skull base development were assessed as predictors of tentorial venous anatomy variation via Cramér V association, the binary encoded Pearson correlation, and nearest-point algorithm with the Euclidean distance metric for clustering. RESULTS: Tentorial vein development was related to the ringed configuration of the tentorial sinuses (P < .005). There were 3 configurations. Groups 1A and 1B (n = 50/238) had ringed configuration, while group 2 did not (n = 188/238). Group 1A (n = 38/50) had a medialized ringed configuration, and group 1B had a lateralized ringed configuration (n = 12/50). Measurements of skull base development were predictive of these groups. The ringed configuration of group 1 was related to the presence of a split confluens, which correlated with a decreased internal auditory canal-petroclival fissure angle. Configuration 1A was related to the degree of petrous apex pneumatization (P value = .010). CONCLUSIONS: Variations in the transtentorial venous system directly correlate with cranial development.
BACKGROUND AND PURPOSE: A new transtentorial venous system consisting of medial, intermediate, and lateral tentorial veins, connecting infra- and supratentorial compartments, was recently shown in 2 cadaver dissections and 2 patient scans. We sought to characterize the venous patterns within the tentorium and their relation to measures of skull development in a cohort of healthy adults. MATERIALS AND METHODS: We retrospectively reviewed tentorial venous anatomy of the head using CTA/CTV performed for routine care or research purposes in 238 patients. Included studies had adequate contrast opacification of venous structures and a section thickness of ≤2 mm; we excluded cases with space-occupying lesions and vascular pathologies. Tentorial angle, dural sinus configurations, and measures of skull base development were assessed as predictors of tentorial venous anatomy variation via Cramér V association, the binary encoded Pearson correlation, and nearest-point algorithm with the Euclidean distance metric for clustering. RESULTS: Tentorial vein development was related to the ringed configuration of the tentorial sinuses (P < .005). There were 3 configurations. Groups 1A and 1B (n = 50/238) had ringed configuration, while group 2 did not (n = 188/238). Group 1A (n = 38/50) had a medialized ringed configuration, and group 1B had a lateralized ringed configuration (n = 12/50). Measurements of skull base development were predictive of these groups. The ringed configuration of group 1 was related to the presence of a split confluens, which correlated with a decreased internal auditory canal-petroclival fissure angle. Configuration 1A was related to the degree of petrous apex pneumatization (P value = .010). CONCLUSIONS: Variations in the transtentorial venous system directly correlate with cranial development.
Authors: T Okudera; Y P Huang; T Ohta; A Yokota; Y Nakamura; F Maehara; H Utsunomiya; K Uemura; H Fukasawa Journal: AJNR Am J Neuroradiol Date: 1994-11 Impact factor: 3.825
Authors: Pashayar P Lookian; Vikram Chandrashekhar; Anthony Cappadona; Jean-Paul Bryant; Vibhu Chandrashekhar; Jessa M Tunacao; Danielle R Donahue; Jeeva P Munasinghe; James G Smirniotopoulos; John D Heiss; Zhengping Zhuang; Jared S Rosenblum Journal: JCI Insight Date: 2021-11-08