Headache and presyncope. There is a right transoccipital ventricular catheter that terminates in the left lateral ventricle. Artifact associated with the shunt catheter hardware obscures a portion of the right cerebral and cerebellar hemispheres. Otherwise, the ventricular system does not appear to be particularly dilated. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are mildly prominent perivesicular spaces in the frontal lobes. The brain parenchyma and pituitary gland otherwise appear unremarkable. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits are grossly unremarkable.
1. The shunted ventricular system does not appear to be particularly enlarged. 2. No evidence of acute intracranial hemorrhage, mass, or acute infarct.