Hydrocephalus is an abnormal accumulation of cerebrospinal fluid inside the brain’s ventricles, raising intracranial pressure and progressively damaging surrounding brain tissue. The fluid itself isn’t the problem. It’s the pressure that builds when normal CSF flow or absorption breaks down. It can affect newborns, older children and adults, and the underlying cause shapes both the symptoms and the treatment approach. Surgery is usually required, and outcomes depend heavily on how early the condition is identified.
According to Dr. Gurneet Singh Sawhney, neurosurgeon in Mumbai, “Hydrocephalus isn’t one condition. It’s a final common pathway for several different problems, and the surgical plan has to match the underlying cause, not just the scan findings.”
What Causes Hydrocephalus and Who Does It Affect?
Several underlying conditions can disrupt CSF flow or absorption, and the pattern of who gets it varies considerably by age group.
Congenital Causes: some infants are born with aqueductal stenosis or neural tube defects that block CSF drainage before birth, making hydrocephalus one of the more common neurosurgical conditions seen in newborns and young children.
Acquired Causes: meningitis, brain haemorrhage, traumatic head injury or a tumour pressing on drainage pathways can all cause hydrocephalus in someone with no prior problem, sometimes weeks after the original event.
Normal Pressure Hydrocephalus: this variant is more common in adults over sixty and presents with enlarged ventricles despite near-normal CSF pressure, showing up as a triad of gait disturbance, memory difficulty and urinary urgency that is often mistaken for other age-related conditions.
Hydrocephalus Ex Vacuo: the ventricles enlarge here because brain tissue has shrunk from degenerative disease, and surgery doesn’t help the way it does in pressure-driven forms.
Getting the diagnosis right matters because surgical intervention only helps when pressure or obstructed flow is actually the issue. A detailed brain imaging workup is the first step before any treatment decision is made about brain surgery.
How Is Hydrocephalus Treated Surgically?
Two procedures cover most cases, and the choice depends on whether the obstruction is within the ventricular system or downstream.
VP Shunt Surgery: a ventriculoperitoneal shunt diverts CSF from a brain ventricle into the abdominal cavity through a catheter running under the skin, with a programmable valve that controls flow and can be adjusted externally as needs change over time.
Endoscopic Third Ventriculostomy: the neurosurgeon in India creates a small opening at the floor of the third ventricle using an endoscope, allowing CSF to bypass the obstruction and drain naturally, and this works best in non-communicating hydrocephalus where a specific block is identified.
Shunt Revisions: shunts can block, over-drain or become infected over years of use, so patients implanted in childhood often need revision surgeries as they grow and ongoing monitoring remains part of long-term care.
When Surgery Isn’t the Answer: hydrocephalus ex vacuo and some mild normal-pressure cases in frail patients may be managed conservatively, since surgery in these situations carries risk without guaranteed benefit.
The choice between a shunt and ETV isn’t just technical. Age, cause, anatomy and long-term lifestyle expectations all factor in. A related overview of when brain surgery becomes necessary is covered in Do All Brain Tumours Require Surgery?
Why Choose Dr. Gurneet Singh Sawhney?
Dr. Gurneet Singh Sawhney brings 18 years of neurosurgical experience, with advanced fellowship training in functional neurosurgery and neuroendoscopy from Japan. His endoscopic training is directly relevant to ETV procedures, where precision in navigating the ventricular system determines whether the opening remains functional over the long term.
Patients with hydrocephalus need someone who tracks shunt function, adjusts valve settings as physiology changes and knows when a revision is warranted versus when symptoms have another explanation. That follow-up is built into the management approach here.
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Frequently Asked Questions
Will hydrocephalus go away on its own?
Not in most cases. Surgical intervention is needed when pressure is elevated.
How long does shunt surgery take?
The procedure typically takes one to two hours under general anaesthesia.
Can hydrocephalus come back after surgery?
Yes, shunt blockage or failure can cause symptoms to return and may need revision.
Is ETV better than a shunt for hydrocephalus?
ETV avoids a permanent implant but isn’t suitable for every type of hydrocephalus.
Disclaimer: The information shared in this content is for educational purposes only and not for promotional use.