Extraparenchymal disease is known to be associated with more severe complications, such as hydrocephalus, arachnoiditis, and ventriculitis,resulting in a worse overall outcome. Intraventricular cysts are most found in the fourth ventricle (43%–70%) followed by the lateral (11%–43%) and third (1%–29%) ventricles with a minority in the aqueduct (7%–9%).Hydrocephalus is frequently present in intraventricular NCC cases due to mechanical obstruction of CSF flow or associated arachnoiditis.
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