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Rădoi PM, Mincă DI, Rusu MC, et al. Bilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses. Folia Morphol (Warsz). 2021;doi: 10.5603/FM.a2021.0070.
Rădoi, P. M., Mincă, D. I., Rusu, M. C., & Toader, C. (2021). Bilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses. Folia morphologica, . https://doi.org/10.5603/FM.a2021.0070
Rădoi, P M, et al. "Bilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses." Folia morphologica vol. (2021). doi: https://doi.org/10.5603/FM.a2021.0070
Rădoi PM, Mincă DI, Rusu MC, Toader C. Bilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses. Folia Morphol (Warsz). 2021 Jul 26; doi: 10.5603/FM.a2021.0070. Epub 2021 Jul 26. PMID: 34308541.
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Folia Morphol (Warsz). 2021 Jul 26; doi: 10.5603/FM.a2021.0070. Epub 2021 Jul 26.

Bilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses.

Folia morphologica

P M Rădoi, D I Mincă, M C Rusu, C Toader

Affiliations

  1. "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
  2. Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
  3. Division of Anatomy, Faculty of Dental Medicine, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania. [email protected].

PMID: 34308541 DOI: 10.5603/FM.a2021.0070

Abstract

The endothelial-lined dural venous sinuses collect blood from the brain, meninges, and calvaria and drain it to the internal jugular veins. The adult drainage pathway of the venous sinuses confluent is commonly via the transverse and sigmoid sinuses to the jugular bulb. The occipital (OS) and marginal (MS) sinuses are well-represented before birth, in most cases. During a retrospective study of the computed tomography angiograms of a 64 y.o. female was found a rare combination of variants of the posterior fossa sinuses. The confluence of the dural venous sinuses was rhomboidal and drained superiorly the superior sagittal sinus, and inferiorly a well-represented occipital sinus (OS). The transverse sinuses were aplastic, on the right side, and hypoplastic on the opposite side. The OS further drained into the MS which, on each side, emptied into the respective jugular bulb. On each side a condylar vein left the junction of the sigmoid sinus and jugular bulb. Such posterior fossa drainage, exclusively on the OS-MS pathway, should be kept in mind when transections of the venous sinuses are intended during neurosurgical approaches of the foramen magnum. The OS-MS drainage is rather a persisting fetal pattern. The bilateral anatomical exclusion of the transverse sinuses is an added condition to spare the OS and MS.

Keywords: computed tomography; dura mater; foramen magnum; posterior cranial fossa; venous sinus

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