The brain shows supratentorial (4th ventricle is normal) hydrocephalic changes reaching about 4 cm at the level of right atrium with markedly dilated both occipital horns (colpocephaly) .
The right choroid plexus is enlarged ( measuring 4.2 x 1.2 cm), shows cystic changes , extending to the frontal horn and cerebral parenchyma in the fronto-pareital regions. It elicits rim of bright signal in T1WI, intermediate in T2WI with evident restricted diffusion. Normal left choroid plexus
Normal posterior fossa structures.