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AREA OF DEEP WHITE MATTER EDEMA WITHIN RIGHT PARIETO-FRONTAL REGION The arrow points to areas of low attenuation within the deep white matter involving the right parieto-frontal region. The low attenuation is confined to the white matter and extends and interdigitates between the sulci sparing the gray matter. This is characteristic for vasogenic edema. Vasogenic edema may be associated with neoplastic or inflammatory lesions. In a person with normal renal function, and otherwise no contraindications, the use of intravenous iodinated contrast is indicated. VASOGENIC EDEMA Note comparison case above. The arrow points to areas of deep white matter low attenuation in the right fronto-parietal region which interdigitate among the sulci. The possibility of underlying inflammatory or neoplastic lesions should be excluded. RING-ENHANCING LESION WITHIN DEEP WHITE MATTER The arrow points to an area of faint ring enhancement within the area of deep white matter edema. This corresponds to the area of abnormality. This patient was HIV positive. Ring-enhancing lesion should be considered suspicious for neoplastic or inflammatory lesions. Statistically, this is likely toxoplasmosis.
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