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Ectopic arachnoid granulation involving a rare intracranial venous sinus variant
Affiliations- Department of Anatomical Sciences, St. George’s University, True Blue, Grenada, West Indies, Grenada
- Seattle Science Foundation, Seattle, Washington, United States, United States
open access
Abstract
Arachnoid granulations are hypertrophied arachnoid villi, which extend from the subarachnoid space into the venous system and aid in the passive filtration and reabsorption of cerebrospinal fluid. These macroscopic structures have been described in various locations, with the transverse and sigmoid sinuses seen as normal variants on imaging. Here we present the occurrence of an enlarged arachnoid granulation at the foramen rotundum where a variant intracranial venous sinus was identified during routine dissection. Variations, such as the one described herein, should be recognised by those who operate or interpret images of the skull base.
Abstract
Arachnoid granulations are hypertrophied arachnoid villi, which extend from the subarachnoid space into the venous system and aid in the passive filtration and reabsorption of cerebrospinal fluid. These macroscopic structures have been described in various locations, with the transverse and sigmoid sinuses seen as normal variants on imaging. Here we present the occurrence of an enlarged arachnoid granulation at the foramen rotundum where a variant intracranial venous sinus was identified during routine dissection. Variations, such as the one described herein, should be recognised by those who operate or interpret images of the skull base.
Keywords
arachnoid granulations, intracranial venous sinus, foramen rotundum
About this articleTitle
Ectopic arachnoid granulation involving a rare intracranial venous sinus variant
Journal
Issue
Article type
Case report
Pages
319-321
Published online
2016-10-10
Page views
1173
Article views/downloads
1244
DOI
10.5603/FM.a2016.0062
Pubmed
Bibliographic record
Folia Morphol 2017;76(2):319-321.
Keywords
arachnoid granulations
intracranial venous sinus
foramen rotundum
Authors
R. Umeh
M. Loukas
R. J. Oskouian
R. S. Tubbs
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