History of metastatic small cell lung cancer. There are multiple bilateral supratentorial and infratentorial enhancing lesions have overall decreased in size. For example, the largest lesion is located in the left frontal lobe and measures up to 22 mm, previously 35 mm. Likewise, the associated vasogenic edema has generally diminished. There is no significant residual midline shift and effacement of the ventricular system. There is a background of mild cerebral white matter T2 hyperintensity, which may represent chronic small vessel ischemic disease. There is no evidence of acute cerebral infarction. There is minimal mucosal thickening of the left maxillary sinus. The orbits, skull, and scalp soft tissues are grossly unremarkable.
Interval decrease in size of multiple supratentorial and infratentorial metastatic lesions and diminished associated vasogenic edema, indicating treatment response. 