MRI
Sagittal T1
Sagittal T2
Axial T2
Axial FLAIR
Coronal T1
The ventricles are enlarged and a very pronounced flow void is present in the aqueduct. CSF flow studies (not shown) demonstrate elevated stroke volume (>150microL). The corpus callosum is elevated and thinned with fenestration of the septum pellucidum. The callosal angle is not increased however, nor are the sylvian fissures widened.