title: Brain Herniation into Giant Arachnoid Granulation: An Unusual Case.
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.
authors.affiliation: Radiology Unit, Medical Imaging Department, Centro Hospitalar de Tondela-Viseu, EPE, Viseu, Portugal.
authors.forename: Joana Ruivo
authors.identifier: 0000-0003-2165-4794
authors.initials: JR
authors.lastname: Rodrigues
authors.affiliation: Neuroradiology Unit, Medical Imaging Department, Centro Hospitalar de Tondela-Viseu, EPE, Viseu, Portugal.
authors.forename: Gonçalo Roque
authors.initials: GR
authors.lastname: Santos