RT Journal Article
SR Electronic
T1 Tentorial Venous Anatomy: Variation in the Healthy Population
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1825
OP 1832
DO 10.3174/ajnr.A6775
VO 41
IS 10
A1 Rosenblum, J.S.
A1 Tunacao, J.M.
A1 Chandrashekhar, V.
A1 Jha, A.
A1 Neto, M.
A1 Weiss, C.
A1 Smirniotopoulos, J.
A1 Rosenblum, B.R.
A1 Heiss, J.D.
YR 2020
UL http://www.ajnr.org/content/41/10/1825.abstract
AB 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.CC-JBcarotid canal–jugular bulbIAC-PCFinternal auditory canal–petroclival fissureITVintermediate tentorial veinLTSlateral tentorial sinusLTVlateral tentorial veinMTSmedial tentorial sinusMTVmedial tentorial veinRCringed configuration