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About 1 in every 1000 babies1 is born with hydrocephalus, a condition in which too much cerebrospinal fluid builds up in the brain’s ventricles. Symptoms can include vomiting, lethargy, headache, enlarged head or even seizures. There is no cure, but implanting a shunt often provides long-term relief.
Hydrocephalus is a condition in which an excess of cerebrospinal fluid accumulates in the cavities of the brain known as "ventricles." The term "hydrocephalus" is derived from two Greek words: hydro (water) and kephale (head). Hydrocephalus is still sometimes referred to as "water on the brain." Hydrocephalus is a condition in which an excess of cerebrospinal fluid accumulates in the cavities of the brain known as "ventricles."
Under normal conditions, a delicate balance exists between the production, circulation, and absorption levels of cerebrospinal fluid in the brain’s ventricles.
Hydrocephalus is the result of an imbalance of the distribution of cerebrospinal fluid. The three types of hydrocephalus include:
Both non-communicating and communicating hydrocephalus can be either "congenital" (existing before or at birth) or "acquired" (developing after birth due to trauma or disease).
In infants and toddlers, the bones of the skull are not yet closed, and hydrocephalus may be obvious. The child’s head will enlarge, and the fontanelle (soft spot) may be tense and/or bulging. The skin may appear thin and shiny, and the veins of the scalp may appear full or engorged.
Symptoms may include:
In older children and adults, the bones of the skull have closed. These individuals have symptoms of increased intracranial pressure due to ventricular enlargement from the extra cerebrospinal fluid, which causes compression of the brain tissue.
Symptoms may include, but are not limited to:
The signs and symptoms of increasing intracranial pressure are likely to change over time, as the cranial sutures (the joints between the bones of the skull) begin to close in the infant and toddler and become fully closed in older children.
There are several tests that can help in diagnosing hydrocephalus. These same studies can also help evaluate the shunt in case of malfunction or infection.
Patients & caregivers: This information is designed to provide you with helpful educational information but is for information purposes only, is not medical advice, and should not be used as an alternative to speaking with your doctor. No representation is made that the information provided is current, complete, or accurate. Medtronic does not assume any responsibility for persons relying on the information provided. Be sure to discuss questions specific to your health and treatments with a healthcare professional. For more information please speak to your healthcare professional.