• Thiago P Rodrigues, Mariana Athaniel Silva Rodrigues, Italo Capraro Suriano, and Samuel Tau Zymberg.
• Department of Neurology and Neurosurgery, Federal University of São Paulo, São Paulo, Brazil. Electronic address: thiagopereirarodrigues@yahoo.com.br.
• World Neurosurg. 2018 Nov 1; 119: 17-19.

ObjectivesIdiopathic intracranial hypertension refers to cases of intracranial hypertension and normal brain parenchyma without ventriculomegaly or any kind of mass lesion. Perineural cysts are cerebrospinal fluid-filled cysts that usually arise from nerve roots near the dorsal ganglia. Often asymptomatic, they rarely cause mass effect symptoms. The association of these conditions is discussed herein.MethodsWe describe 2 patients with idiopathic intracranial hypertension and symptomatic sacral perineural cysts. In both cases the treatment of idiopathic intracranial hypertension ameliorated the sacral perineural cyst symptoms, and in 1 case we observed shrinking of the sacral perineural cysts.ResultsOn the basis of this review, it is impossible to conclude whether there is an association between idiopathic intracranial hypertension and symptomatic perineural cysts. However, as an initial observation, this report can reveal a possible association.ConclusionsIn some instances, idiopathic intracranial hypertension can be associated with symptomatic sacral perineural cysts. In this clinical scenario, the treatment of idiopathic intracranial hypertension may improve perineural cyst symptoms.Copyright © 2018 Elsevier Inc. All rights reserved.

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