# Management of hydrocephalus associated with large vestibular schwannomas

## TL;DR

The study compares two treatment approaches for hydrocephalus caused by large vestibular schwannomas and finds that removing the tumor first often resolves the issue.

## Contribution

The study provides evidence that tumor resection is often more effective than CSF shunting for managing hydrocephalus in large vestibular schwannomas.

## Key findings

- Tumor resection resolved hydrocephalus in 18 out of 21 patients.
- Previous radiosurgery and tumor capsule adherence to the brain were linked to needing CSF shunting.
- Patients with well-tolerated hydrocephalus should prioritize schwannoma removal over shunting.

## Abstract

Some patients with vestibular schwannoma (VS) may present with hydrocephalus.

In such cases, some authors suggest cerebrospinal fluid (CSF) shunting, while others prefer tumor removal from the outset.

In our study, we retrospectively compared patients for whom we chose to treat the hydrocephalus with CSF shunting and those for whom VS surgery was performed first.

Among a group of n consecutive patients harboring a stage 3 and 4 VS and eligible for resection, 34 patients presented with hydrocephalus. Thirteen patients underwent CSF shunting (group 1). Twenty-one patients had their VS removed first (group 2). Among the latter group, 18 patients had resolution of hydrocephalus. There was a significant difference between group 1 and 2 in the presence of signs of intracranial hypertension (p = 0.00), preoperative tumor volume (p = 0.04).

Previous radiosurgery and a strong adherence of the tumor capsule to the brain were statistically associated with requirement of CSF shunting (p = 0.01).

The results of this study suggest that VS patients presenting with a well-tolerated hydrocephalus should be preferentially treated of their schwannoma with rare need for a shunt.

•Vestibular schwannomas may present with hydrocephalus.•Treatment may involve cerebrospinal fluid shunting or tumor resection.•Previous radiosurgery may associate with requirement of CSF shunting.

Vestibular schwannomas may present with hydrocephalus.

•Treatment may involve cerebrospinal fluid shunting or tumor resection.

•Previous radiosurgery may associate with requirement of CSF shunting.