Hydrocephalus, unspecified [G91.9] / Headache [R51], Reason for Study: ^Reason: eval cyst size, eval flow though catheter, eval CSF flow History: headache, vision less, word finding difficulty No evidence of acute ischemic or hemorrhagic lesion.Redemonstration of right hemispherectomy with the ventricular catheter inserted through the right side ventricle and the tip location is at the left lateral ventricle occipital horn, unchanged.At least 3 separated CSF collecting cavity (previously called cysts) are redemonstrated. Comparing to prior scan performed on September 17, 2016, the maximum diameter of the largest cyst 3 sisters appear to be stable, unchanged.Previously shown, right extra-axial extradural fluid collection cavity adjustment to the ventricular catheter insertion point is again seen, unchanged in terms of its maximum diameter and MR characteristics.Extensive T2/FLAIR high signal intensity lesions on periventricular white matter are stable, unchanged.The paranasal sinuses and mastoid air cells are clear.CSF Flow studyCSF flow is seen mainly anterior aspect of brain stem and foramen magnum. Trans foramen magnum directional flow is visualized. In particular, cranio petal CSF flow through the foramen magnum is well visualized but craniofugal flow is not as conspicuous on this scan.
1. No evidence of acute ischemic or hemorrhagic lesion.2. Unchanged maximum size and configuration of the left side ventricular cystic lesions since prior scan.3. Demonstration of bidirectional trans foramen magnum CSF flow, mainly shown on the anterior aspect of the foramen magnum.