Recent third ventriculostomy. There are postoperative findings related to recent third ventriculostomy with a small amount of subdural pneumocephalus and pneumoventricle, as well as trace blood products in the left frontal convexity subdural and bilateral occipital horns of the lateral ventricles. There is a jet of cerebrospinal fluid flow into the third ventricle from the basal cisterns via a small defect in the floor of the third ventricle. However, there is persistent dilatation of the third and lateral ventricles. Bilateral transfrontal ventricular catheters remain in position. There is no evidence of acute infarct. There is minimal high T2 signal in the periventricular white matter and along the left transfrontal ventriculostomy tract. There is no midline shift or herniation. The major cerebral flow voids are intact. There is scalp swelling at the sites of prior stereotactic head frame screw positions. The orbits are grossly unremarkable.
Interval third ventriculostomy, which appears to be patent, but persistent dilatation of the third and lateral ventricles.