Congenital hydrocephalus is a condition present at birth in which
excess cerebrospinal fluid (CSF) collects within the brain. The brain's
passageways (ventricles) may not drain or absorb fluid properly, leading to
increased pressure within the brain.
The most obvious symptom of hydrocephalus is an unusually large
head, which will most likely be noticed at birth or within the first 9 months
of life. Other symptoms in an infant may include irritability, excessive
sleeping, vomiting, and poor feeding.
Congenital hydrocephalus may result from either genetic or other
causes, such as prenatal hemorrhage (bleeding before birth in the fetus) or
infections such as toxoplasmosis, rubella, syphilis, or mumps. It may be
associated with other birth defects, especially neural tube defects.
The main way to treat hydrocephalus is with a shunt, a type of
small tube that is placed in the brain to allow the excess fluid to drain so it
can be absorbed. Shunts usually are permanent, but they sometimes need to be
replaced because of malfunction or infection.
Left untreated, the increasing pressure caused by CSF buildup can
lead to brain damage or death. With prompt diagnosis and treatment, some
serious problems can be prevented or limited.
January 24, 2012
John Pope, MD - Pediatrics & Christian G. Zimmerman, MD, FACS, MBA - Neurological Surgery
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