Hydrocephalus, unspecified [G91.9] / Other complicated headache syndrome [G44.59] / Cerebral cysts [G93.0], Reason for Study: ^Reason: 27 year old female with, cerebral palsy, encephalitis, post hemispherectomy as child, hydrocephalus with VP shunt and mul Right hemispherectomy status, unchanged.There is no evidence of acute ischemic or hemorrhagic lesion on this scan.Multiloculated fluid collections appear to be unchanged in terms of maximum diameter since prior scan.The periventricular white matter T2/FLAIR high signal intensities are again seen, unchanged. Collapsed left lateral ventricle, unchanged.Extradural lenticular shaped fluid collection on the right side is again seen, unchanged in its maximum diameter.There is, however, tubular shaped low signal intensity portion on all sequences on the right frontal area [11.5mm (AP) x 11.2mm (RL) x 23.6mm (CC)] indicating air filled space. On prior scan performed on Dec 28 2015, this lesion was filled with fluid which was filled with air on Sep 23 2015.The paranasal sinuses and mastoid air cells are clear.
No evidence of acute ischemic or hemorrhagic lesion on this scan.Filing of air at the right extra dural space which was filled with fluid on prior scan as described above.Otherwise no interval change of post right hemispherectomy status since prior scan.