Reason: view for flow through ETV History: s/p ETV. Mid cerebral aqueductal stenosis and surgical third ventriculostomy defect appear similar to the prior exam. Significantly dilated lateral and third ventricles remain unchanged in size. Fourth ventricle is stable. Robust CSF flow ithrough the third ventriculostomy defect into the prepontine cistern is again identified. Scattered foci of intraparenchymal and intraventricular susceptibility is unchanged. A small amount of gliosis again is again identified along the previous right frontal lobe ventriculostomy catheter tract.No midline shift or mass effect. No diffusion abnormality. Incidental note is again made of a small focal area of prominent CSF signal the along the left paramedian posterior fossa, likely a small retrocerebellar cyst. Normal flow voids within the major intracranial vascular structures. Partial empty sella is unchanged.
Continued stable exam with no significant change in lateral and third ventriculomegaly, status post third ventriculostomy which is patent.