Core Terms & Classification
Obstructive hydrocephalus
Obstructive hydrocephalus is another name for non-communicating hydrocephalus, caused by a blockage in the flow of cerebrospinal fluid.
In short: Obstructive hydrocephalus
- It is the same as non-communicating hydrocephalus.
- A blockage interrupts CSF flow within the ventricles.
- It is often treatable with endoscopic third ventriculostomy (ETV).
- Common causes include aqueductal stenosis and tumors.
What it is
Obstructive hydrocephalus is the term emphasizing the blockage ("obstruction") that prevents CSF from flowing normally through the ventricular system. It is identical to non-communicating hydrocephalus.
Understanding Obstructive hydrocephalus
The obstruction can occur at various points — most commonly the cerebral aqueduct, but also the foramina between ventricles or the outlets of the fourth ventricle — and may be caused by narrowing (stenosis), a tumor, a cyst, or other lesions. Because the problem is a discrete blockage, obstructive hydrocephalus is frequently a good candidate for endoscopic third ventriculostomy (ETV), which creates a new opening to let fluid bypass the blockage, sometimes avoiding the need for a shunt.
Why it matters
Understanding obstructive hydrocephalus helps families see why this type is often treated by bypassing the blockage with ETV. Identifying the location and cause of the obstruction is central to choosing the best treatment.
Common questions
Is obstructive the same as non-communicating?
Yes — the terms mean the same thing.
How is it often treated?
Frequently with ETV, which bypasses the blockage.
What causes the obstruction?
Often aqueductal stenosis, a tumor, or a cyst.
Bottom line
Obstructive hydrocephalus is non-communicating hydrocephalus caused by a blockage, often treatable by bypassing it with ETV.
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