Core Terms & Classification
Secondary hydrocephalus
Secondary hydrocephalus is hydrocephalus that develops as a consequence of another identified condition.
In short: Secondary hydrocephalus
- It results from a separate, identifiable cause.
- Causes include hemorrhage, infection, and tumors.
- It is contrasted with "primary" hydrocephalus.
- Treating the underlying cause can be part of management.
What it is
Secondary hydrocephalus is hydrocephalus that arises because of another condition — the hydrocephalus is a downstream consequence of an identifiable cause. It is used in contrast to "primary" hydrocephalus.
Understanding Secondary hydrocephalus
The underlying causes can include bleeding into the CSF spaces, infections such as meningitis, brain tumors obstructing flow, or other conditions. Because there is an identifiable trigger, management may involve addressing that underlying cause where possible, in addition to treating the hydrocephalus itself (for example, with a shunt or ETV). As with "primary," the usage of "secondary" can vary among clinicians, so confirming the specific meaning with the care team is helpful.
Why it matters
Understanding secondary hydrocephalus helps families see that the hydrocephalus follows another condition, and that treating or addressing the underlying cause can be part of the overall plan.
Common questions
What does secondary hydrocephalus mean?
Hydrocephalus caused by another identified condition.
What are common causes?
Hemorrhage, infection, and tumors, among others.
Is the underlying cause treated too?
Where possible, addressing the cause can be part of management.
Bottom line
Secondary hydrocephalus develops as a consequence of another condition, such as hemorrhage, infection, or a tumor.
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