Female, 54 years old, history of metastatic lung cancer to the brain status post SRS. At least 5 small supratentorial enhancing lesions are identified, all of which have decreased in size when compared to the prior examination (see key images). One or two lesions seen on the prior examination are no longer clearly evident. For reference purposes, a left parietal lesion measures 2 mm (image 45 series 12), previously 6 mm. Areas of mild edema previously associated with several of these lesions have resolved.Infratentorially, two ill-defined adjacent foci of enhancement within the right cerebellar hemisphere have not significantly changed. One of these is associated with strong susceptibility artifact. One or two small foci of enhancement seen previously are no longer evident.No evidence of significant parenchymal edema or mass effect is seen. Scattered small foci of T2 hyperintensity in the bilateral cerebral white matter are unchanged and may reflect treated lesions or nonspecific white matter injury.A nonenhancing cystic lesion in the pineal region is unchanged measuring up to 16 mm in diameter. No other abnormal collections are seen. The ventricles are normal in size and morphology.
1.Since the prior examination, numerous supratentorial and infratentorial enhancing lesions have decreased in size or resolved entirely.2.Two enhancing lesions within the right cerebellum show no significant interval change. No new intracranial lesions are appreciated.