Male, 52 years old, with metastatic lung cancer to the brain, planning exam for stereotactic radiosurgery. A nonenhancing lesion within the left inferior frontal lobe has not significantly changed in size. On T2-weighted images, this lesion measures 10 x 6 mm.A 6 mm mildly enhancing lesion along the right occipital lobe cortex is unchanged. A 5 mm mildly enhancing lesion along the right superior parietal lobule cortex is unchanged.A lobular lesion within the left cerebral hemisphere showing questionable minimal internal enhancement is redemonstrated. On T2-weighted images, this lesion measures 10 x 10 mm showing no significant interval change.No evidence of any new intracranial lesions is seen. The above lesions cause no significant edema or mass effect. Morphology of the brain parenchyma is otherwise unremarkable. The ventricles are stable and normal in size.
Multiple nonenhancing or minimally enhancing lesions are demonstrated both supra and infratentorially. No significant change is seen in any of these lesions, and no new lesions are detected.