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Living with Congenital hydrocephalus

A condition in which a baby is born with too much fluid in the brain, causing pressure and, often, a larger head.

Understanding Congenital hydrocephalus

Congenital hydrocephalus is a condition in which a child is born with too much cerebrospinal fluid (CSF) in the brain.

CSF is the clear fluid around the brain and spinal cord. The excess widens the brain's fluid spaces (ventricles) and can press on brain tissue. It has genetic and non-genetic causes and can occur alone or with other differences as part of a syndrome. It is seen during pregnancy.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Large head (macrocephaly)
  • Bulging forehead and wide soft spots
  • Seizures
  • Intellectual disability and delayed motor skills
  • Eyes that do not line up (strabismus)
  • Widened brain spaces (ventriculomegaly)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists and genetic specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

  4. Connect with expert centers

    Hydrocephalus Association may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: Hydrocephalus Association
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Hydrocephalus Association
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What type of hydrocephalus is it, and what is the cause?
Does my child need a shunt or other surgery?
Should we have genetic testing, such as for L1CAM?

Quick facts

Symptoms usually startduring Pregnancy

Causes include changes in the L1CAM gene (the most common), changes in many other genes, brain or spinal cord differences, infections, bleeding in the brain, trauma, certain drug exposures, or a brain tumor present at birth.

GeneticNeurological

Also known as: congenital dilatation of cerebral ventricles; congenital hydrencephalus; congenital hydrencephaly; congenital hydrocephaly; hydrocephalus in newborn; primary hydrocephalus

Patient organizations

Source: NIH GARD · Congenital hydrocephalusGARD ID 6682 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Congenital hydrocephalus.

Explore the Congenital hydrocephalus blog

Explore research for Congenital hydrocephalus

Explore actively recruiting Congenital hydrocephalus studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Congenital hydrocephalus with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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