Hydrocephalus Due to Congenital Stenosis of Aqueduct of Sylvius: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Hydrocephalus Due to Congenital Stenosis of Aqueduct of Sylvius?
A neurosurgeon, who performs surgery on the brain and nervous system, usually treats this condition. A neurologist may help with diagnosis and follow-up care. A primary care doctor can refer a patient to the right specialist. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Hydrocephalus due to congenital stenosis of the aqueduct of Sylvius is a condition where too much fluid builds up in the brain. The aqueduct of Sylvius is a tiny channel that lets cerebrospinal fluid flow through. "Congenital" means a person is born with the problem, and "stenosis" means the channel is narrowed or blocked. The trapped fluid builds up and puts pressure on brain tissue.
Symptoms
Symptoms depend on age. Babies may have a rapidly growing head, a bulging soft spot, vomiting, sleepiness, or eyes that look downward. Older children and adults may have headaches, nausea, balance trouble, blurry vision, or memory problems.
Causes and who gets it
The aqueduct can be narrowed before birth as the baby's brain forms in the womb. In some families it is passed down through genes, often linked to the L1CAM gene on the X chromosome, so the inherited form is more likely to affect boys.
How doctors diagnose it
Doctors start with a physical exam and questions about symptoms and family history, then often use imaging tests. An MRI makes detailed pictures of the brain, and a CT scan makes pictures from several angles. These scans can show enlarged fluid spaces and a blocked aqueduct.
Treatment
The usual treatment is surgery to move the extra fluid away from the brain. One option is a shunt, a thin tube under the skin that drains fluid from the brain into the belly. Another is an endoscopic third ventriculostomy, in which a surgeon makes a small opening so fluid can bypass the blockage.
When to see a doctor
Anyone with ongoing headaches, vision changes, balance problems, or memory trouble should see a doctor. A rapidly growing head, bulging soft spot, vomiting, or extreme sleepiness in a baby needs prompt medical attention. Sudden severe headache, vomiting, or confusion needs emergency care.
How a direct primary care or concierge doctor fits in
A direct primary care doctor is one where the patient pays a flat monthly fee; a concierge doctor is similar but costs more. They can watch symptoms and coordinate care, but cannot perform brain surgery and will refer a patient to a specialist.
Common questions
Can this condition be cured?
Surgery usually controls the fluid buildup and relieves pressure. It does not fix the narrowed channel itself. Many people live full lives after treatment. Outcomes differ from person to person, and some people need follow-up procedures.
Is hydrocephalus the same as a brain tumor?
No. Hydrocephalus means extra fluid in the brain, and it can have many causes. In this condition, the cause is a narrowed channel that the fluid flows through, not a growth.
Can adults get this if they were born with it?
Yes. Some people have a mild blockage from birth and do not notice symptoms until adulthood. Doctors sometimes call this "arrested" or "long-standing" hydrocephalus when it is found later in life.
Will my children inherit it?
Some cases run in families, especially those linked to the L1CAM gene. A genetic counselor can help families understand the chance of passing it on. Many cases happen with no family history at all.
Sources
- MedlinePlus - Hydrocephalus
- NIH Genetic and Rare Diseases Information Center - Congenital hydrocephalus
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
