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Triventricular hydrocephalus is caused by an obstruction of cerebrospinal fluid flow causing increased intracranial pressure (ICP). Common treatment options include ventricular shunting or endoscopic third ventriculocisternostomy. Spontaneous third ventriculocisternostomy is a rare phenomenon in patients with obstructive triventricular hydrocephalus. We present the case of a patient with triventricular hydrocephalus and evidence of spontaneous third ventriculocisternostomy.

A 33-year-old female patient was referred to our outpatient clinic for triventricular hydrocephalus diagnosed on imaging. Magnetic resonance imaging (MRI) of her brain showed a triventricular obstructive hydrocephalus owing to a possible aqueductal stenosis. No clinical or diagnostic signs of elevated ICP were present. Repeat imaging showed no changes in cerebral ventricular size and MRI flow imaging …