83-year-old man with right frontal contusion and left frontal epidural hematoma. Question extension of hematoma. There are bilateral, fluid-density subdural CSF collections. These appear slightly enlarged from previous studies, although the previous exam is suboptimal. The crescent shaped lesion in the left pterion region is isodense to the brain parenchyma and consistent with a meningioma -- this could be better evaluated with MRI. The lesion measures 1.5 x 0.8 cm (series 1430 image 12).There are periventricular regions of hypoattenuation consistent with age-indeterminate, small vessel ischemic disease.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.The right frontal scalp hematoma is decreased in size from the prior study.
1. Bilateral subdural CSF collections with slight increase in size from previous study.2. Left pterion lesion consistent with meningioma.3. No CT evidence of epidural hematoma as questioned on requisition.