Idiopathic intracranial hypertension without intracranial hypertension

Mattia Sansone; Michelangelo De Angelis; Leonilda Bilo; Vincenzo Bonavita; Roberto De Simone

doi:10.1212/CPJ.0000000000001022

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Abstract

The intracranial pressure (ICP) show large daily fluctuation, mainly due to postural changes and physical activity (e.g. it goes up to 470 mmH₂O under Valsalva manoeuvre¹). Consequently, the dural sinus must be sufficiently rigid in order to avoid its collapse during cerebrospinal fluid (CSF) pressure peaks. Hereby, we describe a patient with collapsible dural sinus associated with an intracranial hypertension syndrome without a detectable raised ICP, suggesting that a number of crucial assumptions on idiopathic intracranial hypertension with (IIH) or without papilledema (IIHWOP) might be discussed.

Received June 10, 2020.
Accepted September 22, 2020.

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