Fig. 8
From: Non-visualisation of cavum septi pellucidi: implication in prenatal diagnosis?
Hydranencephaly. a Coronal ultrasound at 20 weeks’ gestation demonstrates non-visualisation of CSP, and significant CSF-filled supratentorial cavity (asterisk). Anterior falx is faintly present (arrow), which excludes alobar HPE. b Axial T2-weighted MRI at 22 weeks’ gestation demonstrates extensive destruction of hemispheres. There is sparing of the cerebellum (c), midbrain (mid), thalami (t) and occipital lobes (occ), which are regions supplied by the vertebrobasilar artery. Cortical rim is absent excluding severe hydrocephalus and confirming hydranencephaly