Metastatic small cell lung cancer, brain metastases, on chemotherapy. There are postoperative findings related to right frontal craniotomy, with underlying confluent high T2 signal with encephalomalacia and susceptibility effect in the right frontal lobe, with an unchanged subcentimeter area of enhancement. There are also multiple other supratentorial and infratentorial metastatic lesions, some of which are stable and some of which are smaller. For example, a left middle frontal gyrus lesion measures up to 6 mm in diameter, previously also 6 mm, and a posterior medullary lesion measures 5 mm in diameter, previously 10 mm. Many of the lesions contain hemorrhagic components levels, some of which have evolved. There is no evidence of acute infarct. The ventricles and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact.
Postoperative findings related to right frontal craniotomy, with an unchanged nonspecific subcentimeter area of enhancement. Multiple other supratentorial and infratentorial metastatic lesions are stable or smaller and many contain hemorrhagic components. 