Male, 63 years old, with aqueduct stenosis, surveillance exam. No significant interval change is seen in the degree of marked lateral and third ventriculomegaly with modest prominence of the fourth ventricle. The cerebral aqueduct is perhaps narrowed proximally, similar to the prior exam. As before, there is a defect in the floor of the third ventricle through which a jet of CSF flow passes as seen on the phase contrast CSF flow images.No pathologic parenchymal or extra-axial enhancement is seen. Redemonstrated is extensive white matter volume loss and scattered nonspecific foci of T2 hyperintensity showing no significant interval change from prior. The inferior vermis is small and the foramina of Magendie and Luschka are wide, also stable findings. A right frontal bone burr hole is redemonstrated.
1.No significant change in the degree or pattern of ventriculomegaly.2.Findings compatible with a patent third ventriculocisternostomy.