The septum pellucidum is completely absent. Hypoplastic both optic nerves and chiasm. The corpus callosum is stretched and thinned. Pituitary gland is normal.
Moderately dilated supra-tentorial ventricular system with normal sized fourth ventricle and widened sylvian fissures. The mammillo-pontine distance = 8 mm. No periventricular CSF permeation seen. Aqueductal stenosis is noted. No associated Chiari malformations.