Right hemisphere cysts. There is a multiloculated cystic lesion in the right frontal lobe that extends to the right lateral ventricle. Overall, the lesion measures 42 x 36 mm in axial cross-section, which is unchanged since 2012. There is also unchanged minimal surrounding T2 hyperintensity. There is also a multiloculated cystic lesion along the anterior right frontal convexity, which measures 49 x 14 mm in axial cross-section, which is unchanged. There is no evidence of intracranial hemorrhage or acute infarct. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are unchanged in size and configuration. There is no cerebral or cerebellar herniation. The major cerebral flow voids are intact. The orbits, skull, and scalp soft tissues are unchanged. There is mild scattered paranasal sinus mucosal thickening and retention cyst formation.
The right frontal lobe porencephalic and frontal convexity arachnoid cysts are unchanged since 2012.