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Case Reports in Radiology
Volume 2017, Article ID 8532074, 4 pages
https://doi.org/10.1155/2017/8532074
Case Report

Brain Herniation into Giant Arachnoid Granulation: An Unusual Case

1Radiology Unit, Medical Imaging Department, Centro Hospitalar de Tondela-Viseu, EPE, Viseu, Portugal
2Neuroradiology Unit, Medical Imaging Department, Centro Hospitalar de Tondela-Viseu, EPE, Viseu, Portugal

Correspondence should be addressed to Joana Ruivo Rodrigues; moc.liamg@031oviur.anaoj

Received 27 December 2016; Revised 21 February 2017; Accepted 5 March 2017; Published 14 March 2017

Academic Editor: Silvio Mazziotti

Copyright © 2017 Joana Ruivo Rodrigues and Gonçalo Roque Santos. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Arachnoid granulations are structures filled with cerebrospinal fluid (CSF) that extend into the venous sinuses through openings in the dura mater and allow the drainage of CSF from subarachnoid space into venous system. Usually they are asymptomatic but can be symptomatic when large enough to cause sinus occlusion. We report a rare case of a brain herniation into a giant arachnoid granulation in an asymptomatic elderly male patient, which was discovered incidentally.