Open AccessBilateral absence of the transverse sinuses with fenestrated superior sagittal sinus draining through enlarged occipital and marginal sinuses
Author(s) -
Petrinel Mugurel Rădoi,
Dragoş-Ionuţ Mincă,
Mugurel Constantin Rusu,
Corneliu Toader
Publication year - 2022
Publication title -
folia morphologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.333
H-Index - 30
eISSN - 1644-3284
pISSN - 0015-5659
DOI - 10.5603/fm.a2021.0070
Subject(s) - medicine , anatomy , dural venous sinuses , sinus (botany) , sigmoid sinus , paranasal sinuses , superior sagittal sinus , foramen magnum , straight sinus , occipital bone , jugular vein , internal jugular vein , jugular foramen , skull , surgery , thrombosis , botany , biology , genus
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-year-old 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 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 foetal pattern. The bilateral anatomical exclusion of the transverse sinuses is an added condition to spare the OS and MS.