• Francesca Romana Barbieri, Federica Novegno, Andrea Iaquinandi, and Pierpaolo Lunardi.
• Department of Neurosurgery, Policlinico Tor Vergata, Rome, Italy. Electronic address: francesca.barbieri87@gmail.com.
• World Neurosurg. 2018 Nov 1; 119: 183-188.

BackgroundHypertrophic pachymeningitis (HP) is a rare primary or secondary inflammatory disorder that manifests with thickening of dura mater involving predominantly the tentorium and falx in the focal form. Hydrocephalus has not been reported in association with secondary HP.Case DescriptionA 61-year-old woman presented with intracranial HP of the posterior fossa secondary to Wegener granulomatosis not responsive to corticosteroid therapy. Owing to the association of noncommunicating hydrocephalus, endoscopic third ventriculostomy was performed. There was immediate improvement of neurologic symptoms and no postoperative complications. The patient had very good clinical and radiologic outcome at 1-year follow-up.ConclusionsIn a case of noncommunicating hydrocephalus related to focal HP of the posterior fossa, endoscopic third ventriculostomy was effective in resolving symptoms related to increased intracranial pressure. The physiopathogenetic mechanisms and therapeutic strategies were discussed along with a review of the most relevant literature.Copyright © 2018 Elsevier Inc. All rights reserved.

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