Specific Types & Syndromes
Tumor-related hydrocephalus
Tumor-related hydrocephalus is hydrocephalus caused by a brain tumor obstructing or affecting CSF flow.
In short: Tumor-related hydrocephalus
- It is hydrocephalus caused by a brain tumor.
- The tumor obstructs or affects CSF flow.
- Treating the tumor can sometimes relieve it.
- CSF diversion may also be needed.
What it is
Tumor-related hydrocephalus is hydrocephalus that results from a brain tumor affecting the flow of cerebrospinal fluid. The tumor, depending on its location, can block the CSF pathways and cause fluid to accumulate.
Understanding Tumor-related hydrocephalus
Tumors near the CSF pathways — such as in or around the ventricles, the cerebral aqueduct, or the posterior fossa — can obstruct CSF flow, causing obstructive hydrocephalus; less commonly, tumors can affect CSF absorption. Treating the tumor (often surgically) can relieve the obstruction in many cases, but some patients also need CSF diversion, either temporarily (an external ventricular drain) or longer-term (a shunt or ETV). The approach depends on the tumor type, location, and whether the hydrocephalus persists after the tumor is treated. Managing both the tumor and the hydrocephalus is part of comprehensive care.
Why it matters
Understanding tumor-related hydrocephalus helps families see how a tumor can cause hydrocephalus by blocking CSF flow, and why both the tumor and the hydrocephalus may need to be addressed.
Common questions
What causes tumor-related hydrocephalus?
A brain tumor obstructing or affecting CSF flow.
Does treating the tumor fix it?
Sometimes; CSF diversion may also be needed.
Which tumors most often cause it?
Those near the CSF pathways, such as in the posterior fossa.
Bottom line
Tumor-related hydrocephalus is caused by a tumor blocking CSF flow, addressed by treating the tumor and, often, diverting CSF.
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