4-year-old male with lethargy and altered mental status. There is a well-defined focus of hypodensity in the right centrum semiovale, which was seen on 2010 MRI of brain; this is consistent with a prominent perivascular space. There is no evidence of intracranial hemorrhage, mass, edema, hydrocephalus, or midline shift. The ventricles and basal cisterns are normal in size and configuration.The calvaria and skull base are radiographically normal. Sphenoid sinuses and ethmoid air cells are opacified. The mastoid air cells are normal in appearance.
1.No acute intracranial abnormality. 2.Sinus opacification.