Ectopic arachnoid granulation involving a rare intracranial venous sinus variant

Umeh, Randle; Loukas, Marios; Oskouian, Rod J.; Tubbs, R. Shane

doi:10.5603/fm.a2016.0062

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…More recently, unilaterally present sinus of Hyrtl have been described in the literature and bilateral occurrences appear to have not been previously reported [8][9][10]. We previously reported a unilateral variant of the sinus of Kelch found in an 88-year-old at death female cadaver [11]. In this specimen, the sinus of Kelch, which was approximately 3 mm in diameter posteriorly and 6 mm in diameter anteriorly, drained posteriorly into the superior petrosal sinus rather than into the transverse sinus.…”

Section: Sinus Of Kelchmentioning

confidence: 92%

Bilateral venous sinuses of Kelch

et al. 2021

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Knowledge of the variant anatomy of the intradural venous sinuses is important to anatomists and clinicians alike. Herein, we report a cadaveric case of the rare venous sinus of Kelch, which some have believed is a remnant of the cranioorbital sinuses. To our knowledge, only one other cadaveric case has been reported in the extant medical literature. Clinically, knowledge of such a variant venous sinus can minimize misdiagnoses such as when anatomical variations are noted on imaging. Surgically, such an understanding can avoid intraoperative complications such as iatrogenic hemorrhage.

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Section: Sinus Of Kelchmentioning

confidence: 92%

Bilateral venous sinuses of Kelch

et al. 2021

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“…( 11 , 12 ). AG occurs in the subarachnoid space along the arachnoid membrane, extending into the dural venous sinuses ( 13 , 14 ) and results in different growth patterns of parasagittal meningioma. However, the relationship between AGs and development of parasagittal meningioma has not been established.…”

Section: Introductionmentioning

confidence: 99%

Anatomical Study of Arachnoid Granulation in Superior Sagittal Sinus Correlated to Growth Patterns of Meningiomas

Gao

et al. 2022

Front. Oncol.

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Meningiomas in the parasagittal region were formed by arachnoidal cells disseminated among arachnoid granulations. The purpose of this study was to characterize the morphology of chordae willisii, and AGs found in the superior sagittal sinus. This study used 20 anatomical specimens. Rigid endoscopes were introduced via torcula herophili into the sinus lumen. The morphological features of arachnoid granulation and chordae willisii were analyzed, and then arachnoid granulations and chordae willisii were assessed by elastic fiber stains, Masson’s stains, and imaging analysis. Three types of arachnoid granulations were present in the examined sinuses. There were 365 counts of arachnoid granulations in examined sinuses by imaging analysis, averaging 1.36 ± 2.58 per sinus. Types I, II, and III made up 20.27, 45.20, and 34.52% of 268 patients, respectively. Microscopy of chordae willisii transverse sections indicated the existence of a single layer and a multiple-layered dura sinus wall. The dural sinus wall was the thickest one in the superior sagittal sinus. The thickness of longitudinal lamellae was significantly greater than trabeculae. This study reveals the anatomical differences between arachnoid granulations in the superior sagittal sinus. The arachnoid granulations classification enables surgeons to predict preoperatively growth patterns, followed by safely achieving the optimal range of parasagittal meningioma resection.

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Ectopic arachnoid granulations

Ekanem

Tubbs

2023

Cerebrospinal Fluid and Subarachnoid Space

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Ectopic arachnoid granulation involving a rare intracranial venous sinus variant

Cited by 4 publications

References 4 publications

Bilateral venous sinuses of Kelch

Bilateral venous sinuses of Kelch

Anatomical Study of Arachnoid Granulation in Superior Sagittal Sinus Correlated to Growth Patterns of Meningiomas

Ectopic arachnoid granulations

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