Risk factorsBy Mayo Clinic staff
In many cases, the exact event leading to hydrocephalus is unknown. However, a number of developmental or medical problems can contribute to or trigger hydrocephalus.
Hydrocephalus present at birth (congenital) or shortly after birth may occur because of any of the following:
- Abnormal development of the central nervous system that can obstruct the flow of cerebral spinal fluid
- Bleeding within the ventricles, a possible complication of premature birth
- Infection in the uterus during a pregnancy, such as rubella or syphilis, that can cause inflammation in fetal brain tissues
Other contributing factors
Other factors that can contribute to hydrocephalus among any age group include:
- Lesions or tumors of the brain or spinal cord
- Central nervous system infections, such as bacterial meningitis or mumps
- Bleeding in the brain from stroke or head injury
- Other traumatic injury to the brain
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