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CONDITION GUIDE

"Hydrocephalus"

Hydrocephalus

Medical Overview

What Hydrocephalus Actually Is

Hydrocephalus is the buildup of cerebrospinal fluid (CSF) inside the ventricles of your brain. The name comes from Greek -- "hydro" (water) and "cephalus" (head). Your brain constantly produces CSF, about 500 ml per day, which normally flows through the ventricles, around the brain and spinal cord, and gets reabsorbed into your bloodstream. When something disrupts that flow or absorption, fluid accumulates, the ventricles swell, and pressure builds against brain tissue.

This is not a rare condition. The global prevalence is approximately 85 per 100,000 people, with significantly higher rates in infants (1 to 32 per 10,000 births) and in people over 80 (more than 400 per 100,000). Both sexes are affected equally. It peaks in infancy due to congenital causes and again later in life due to normal pressure hydrocephalus (NPH).

Sources: NIH/StatPearls (NBK560875), Mayo Clinic, Cleveland Clinic

Types of Hydrocephalus

There are several distinct types, and which one you have matters for treatment:

Symptoms by Age

Infants: Unusually large head, rapid head growth, bulging soft spot (fontanelle), eyes fixed downward ("sunsetting"), poor feeding, vomiting, seizures, irritability, muscle tone problems. Children: Headache, nausea and vomiting, vision problems, balance issues, developmental delays, personality changes, decline in school performance. Adults: Headache, sluggishness, loss of coordination, bladder problems, vision changes, memory and concentration decline. Older adults (NPH): The classic Hakim triad -- gait problems (wide-based, shuffling walk), cognitive decline, and urinary incontinence. These symptoms develop gradually over months or years.

Common Causes

Prognosis

Untreated hydrocephalus can cause permanent brain damage and death. Acute hydrocephalus is a medical emergency. With treatment, many people live full lives, though outcomes vary widely depending on the cause, severity, and how quickly treatment begins. In children, mortality with treatment is 0-3%. Shunt systems require lifelong monitoring and often need revision over time.

Diagnosis & Treatment

How Hydrocephalus Is Diagnosed

Diagnosis combines clinical signs, imaging, and sometimes pressure measurements:

For NPH specifically, diagnosis is tricky because the symptoms overlap with Alzheimer's, Parkinson's, and normal aging. If gait problems appear before cognitive decline, shunting is more likely to help (over 77% improvement rate in some studies).

Treatment

There is no cure for hydrocephalus. All current treatments are surgical:

Shunt placement -- the most common treatment. A thin, flexible tube is implanted to drain excess CSF from the brain to another part of the body where it can be absorbed. The most common type is a ventriculoperitoneal (VP) shunt, draining into the abdominal cavity. Ventriculoatrial (VA) shunts drain into the heart's right atrium and are used when abdominal options are not available. Endoscopic third ventriculostomy (ETV) -- a small hole is made in the floor of the third ventricle, creating an alternate pathway for CSF flow. Works best for obstructive hydrocephalus. Results are poor in very young infants. Emergency procedures -- for acute hydrocephalus, external ventricular drains (EVD) or fontanelle taps in infants provide temporary relief until a permanent solution can be placed. Medication -- Acetazolamide can decrease CSF production and is used mainly for pseudotumor cerebri, but it is not a primary treatment for most hydrocephalus.

Shunt Complications

Shunts are life-sustaining devices, but they come with significant risks:

Many people go years or decades without complications. Others need multiple revisions. Know the signs of shunt failure: headache, vision problems, nausea, vomiting, drowsiness, seizures, fever, or redness along the shunt tract. These require immediate medical attention.

Accommodation Strategies

Workplace Accommodations

Hydrocephalus can affect cognition, energy, vision, and physical coordination. Under the ADA, reasonable accommodations may include:

School Accommodations

Children with hydrocephalus often qualify for an IEP or 504 Plan:

Daily Life Strategies

Benefits & Disability

Social Security Disability

Hydrocephalus does not have its own specific listing in the SSA Blue Book. However, it can qualify under several neurological listings depending on how it affects your functioning:

If you do not meet a specific listing, you may still qualify through a Residual Functional Capacity (RFC) assessment. The SSA evaluates how your condition limits your ability to work by looking at: Documentation matters. Bring imaging results, surgical records, neuropsychological testing, and detailed notes from your neurosurgeon about your functional limitations.

Other Benefits

Notable Public Figures

Public awareness of hydrocephalus is limited, but several well-known individuals have lived with the condition:

The Hydrocephalus Association works to raise awareness and has featured many individuals sharing their experiences through their community programs and advocacy campaigns.

Newly Diagnosed

What to Do First

You just got a diagnosis that sounds terrifying. Take a breath. Here is what you need to know right now:

This is treatable. Hydrocephalus is serious, but it is not a death sentence. The surgical treatments available today allow many people to live full, active lives. The condition requires ongoing monitoring, but it does not have to define everything about your future. Find a neurosurgeon who specializes in hydrocephalus. Not all neurosurgeons have extensive experience with this condition. The Hydrocephalus Association maintains a directory of specialists. If you are in a rural area, ask for a referral to an academic medical center. Learn the emergency signs. Whether you have a shunt or an ETV, you need to know when something is wrong. Sudden severe headache, vomiting, vision changes, confusion, or loss of consciousness are emergencies. Do not wait. Go to the ER and tell them you have hydrocephalus. Get organized. Keep a file with your medical records, imaging, surgical reports, shunt type and settings, and medication list. You will see multiple specialists over time, and having this information readily available speeds up care and reduces errors.

The First Year

What Nobody Tells You

Culture & Media

Representation

Hydrocephalus is not widely represented in mainstream media. When it does appear, it is often reduced to the outdated term "water on the brain" and depicted as a tragic, hopeless condition. This does not reflect the reality for most people living with hydrocephalus today.

The condition has historically carried stigma, particularly for children born with visibly enlarged heads. Modern treatment has changed outcomes dramatically, but public understanding has not caught up.

In Literature and Media

Several books address hydrocephalus from personal and family perspectives:

Misconceptions to Correct

Creators & Resources

Organizations

Online Communities

Podcasts and YouTube

Caregiver Resources

Key Statistics

Sources: NIH/StatPearls, Mayo Clinic, Cleveland Clinic, Hydrocephalus Association