What is hydrocephalus?
Hydrocephalus is a condition in which too much fluid builds
up and puts pressure on the brain. In Latin, hydro means
"water" and "cephalus" means head. People commonly refer to
hydrocephalus as "water on the brain." The water is actually
cerebrospinal fluid (CSF), the clear fluid that surrounds
the brain and spinal cord. Hydrocephalus occurs most often
in newborns.
What is the cause?
We all produce CSF that flows around the brain and spinal
cord. Hydrocephalus can occur when a block in the flow of
this fluid inside the brain develops. This causes swelling
of the spaces in the brain called the ventricles. When the
ventricles swell, they cause harmful pressure on the tissues
of the brain. Another cause of hydrocephalus is when there
is a problem absorbing the CSF fluid on the outside of the
brain.
In children and adults, hydrocephalus can happen after a
head injury or when there is a tumor, infection, or bleeding
anywhere in the brain. Adults may develop hydrocephalus when
the brain is damaged by stroke or when the body has trouble
absorbing the fluid. It may happen after illness or injury,
but most of the time the cause is unknown.
What are the symptoms?
The symptoms include:
- a bulging soft spot on the top of the head (the anterior
fontanel)
- an unusually large head
- vomiting, sleepiness, and irritability
- seizures
- downward deviation of the eyes
- developmental delays
The symptoms of hydrocephalus in older children and adults
include:
- problems with balance, coordination, or walking
- headache followed by vomiting and nausea
- eyes that tend to look downward
- blurred or double vision
- drowsiness, lethargy, irritability, or changes in
personality.
How is it diagnosed?
Your child's health care provider will examine you child and
ask about the symptoms. Your provider will suspect
hydrocephalus if your child's head circumference is growing
too fast. Your child's provider may measure your child's
head. If the head is too large for your child's age, scans
such as an ultrasound, CT scan or an MRI, may be done to
check for enlarged ventricles in the brain. Sometimes
hydrocephalus can be diagnosed before a child is born.
What is the treatment?
Your child's health care provider will check what treatment
options are available. Surgery is commonly done to treat
hydrocephalus. The surgeon usually places a tube called a
shunt, from the brain to the abdomen or blood vessels near
the heart. This allows the extra fluid to drain. For a
child, repeat surgery may be needed as they grow in order to
lengthen the shunt tube.
How long will the effects last?
Hydrocephalus may be mild or severe. In mild cases, there
may be normal intelligence and a near normal life span. In
severe cases, the pressure on the brain may destroy brain
tissue and result in brain damage and physical handicaps.
Where can I get more information?
For more information, contact the Hydrocephalus Association
at 888-598-3789 or visit their Web site at
www.hydroassoc.org. Families who have a loved one with
hydrocephalus may need counseling or support. There are
professional services available including public health
agencies, social services and other agencies for care and
support.


Disclaimer: This content is reviewed periodically and is subject to
change as new health information becomes available. The
information provided is intended to be informative and educational and is not a
replacement for professional medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
HIA File BRN3415F.HTM Release 9.0/2006. Copyright © 2006 McKesson Corporation and/or one of its subdiaries. All Rights Reserved.
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