fig 3.

Case 6.

A, Cine PC MR image (52.0/15.8/1) on the day after the third ventriculostomy shows continuous (patent) flow from the prepontine cistern to the third ventricle, with a small discontinuation in the third ventricular floor (arrow).

B, Cine PC MR image (52.0/15.8/1) 4 months after the third ventriculostomy when the patient presented with confusion. Minor (subtle) flow is seen in the third ventricle (arrowhead) in phase with the prepontine cistern, but there is discontinuation in the third ventricle.

C, At exploration 4 months after the third ventriculostomy, the orifice is covered with a thin membrane and is considered to be a closure.