How was this patients obstructive hydrocephalus treated?
The ventricles have significantly reduced in size and the mass in the dorsal midbrain is still visible, again with peripheral hemosiderin and internal heterogeneous signal. There is no restricted diffusion. No surrounding oedema.
A prominent flow void is seen through the floor of the third ventricle in keeping with a third ventriculostomy. This is best seen on axial T2 images.