Follow-up brain metastases. History of non-small cell lung cancer. There are prominent essentially confluent areas of abnormal T2/FLAIR hyperintensity within the periventricular and subcortical white matter, which are likely posttreatment related. There is no residual contrast enhancement. There is no diffusion abnormality or extra-axial fluid collection. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable. The clivus, left frontal bone and C3 vertebral body lesions are unchanged, probable related to metastasis.
Posttreatment effects within the brain parenchyma, with no new or enlarging parenchymal metastases. Unchanged osseous metastases.