42 year-old female with atrial fibrillation and multiple questionable TIAs. There is no evidence of intracranial hemorrhage, mass or edema. Previously described low density in right posterior parietal region is most likely due to encephalomalacia but has an unusual appearance. This well-defined area appears to exert local mass effect on the adjacent parenchyma and measures CSF density. Congenital malformations such as schizencephaly or arachnoid cyst cannot be ruled out. MRI may be considered as clinically warranted for further evaluation of this area.No acute change and no abnormal postcontrast enhancement.The ventricles and basal cisterns are normal in size and configuration.The calvaria and skull base are radiographically normal. The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
1. No interval change.2. Other findings as described above.