Male, 80 years old, restaging examination for metastatic lung cancer. No focal edema, mass effect or pathologic intracranial enhancement is seen. The previously mentioned focus of apparent enhancement in the left parietal lobe is clearly an artifact on today's examination. Extensive, nearly confluent periventricular white matter T2 hyperintensity is redemonstrated appearing similar to the prior examination. No restricted diffusion is seen. No acute intracranial hemorrhage or any abnormal extra-axial fluid collection is detected. The ventricles remain normal in size and morphology. Bone marrow signal characteristics are within normal limits.
1.No evidence of active metastatic disease in the brain.2.Redemonstration of extensive white matter signal abnormality which may represent a combination of treatment effect and small vessel ischemic disease.