Congenital hydrocephalus is one of the most common CNS congenital anomalies. The incidence of congenital hydrocephalus is estimated as 3 per 1,000 live births. Hydrocephalus is defined as an increase in the cerebral spinal fluid (CSF) volume within the ventricular system independent of the actual head circumference.
Genetics/Basic Defects
- 1.
Physiology of CSF production and absorption
- a.
Production of CSF: by choroid plexus of lateral ventricles
- b.
Pathway of CSF flow
- i.
From lateral ventricles to third ventricle through foramen of Monro
- ii.
From third ventricle to fourth ventricle through aqueduct of Sylvius
- iii.
Out of the ventricular system: from fourth ventricle to spinal subarachnoid spaces through foramen of Magendie or to the basal cisterns through two lateral foramina of Luschka
- i.
- c.
Site of CSF resorption into venous system: primarily through superior sagittal sinus via arachnoid granulations
- a.
- 2.
Types and causes of hydrocephalus
- a....
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(2012). Congenital Hydrocephalus. In: Chen, H. (eds) Atlas of Genetic Diagnosis and Counseling. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-1037-9_53
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