A right parietal external ventricular drainage (EVD) tube is noted.
Absent septum pellucidum and corpus callosum agenesis are noted.
Bilateral asymmetrical dilatation of both occipital horns of lateral ventricles, the right side being larger, suggesting colpocephaly, along with prominent temporal horns.
Dilatation and upward extension of the third ventricle into the interhemispheric fissure are noted.
The fourth ventricle appears not dilated.
There is a large right parasagittal interhemispheric multilocular cystic lesion, with no obvious communication with lateral or third ventricles.
There is evidence of focal right parietal periventricular gray matter heterotopia.
No evidence of intra-cystic hyperintense T1W component or polymicrogyria.
Mega cisterna magna is noted. Unremarkable otherwise posterior fossa structures.