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Causes of Hydrocephalus

Hydrocephalus occurs in 1-1.5% of the population.

Congenital Causes

Aqueduct stenosis, Chiari 1 and 2 malformation (seen in patients with spina bifida), Dandy-Walker Syndrome and Rare X-linked disorders

Acquired Causes

Infection (usually as a consequence of meningitis), Bleeding (bleeding from prematurity, intraventricular haemorrhage), Sub-arachnoid Haemorrhage, Tumours ( e.g. colloid cyst, posterior fossa tumour) and Spinal tumours.