History of lung and thyroid cancer who presented with left-sided leg weakness and inability to walk. There is diffuse patchy and punctate cerebral white matter T2 hyperintensity, which has slightly increased in extent since 2014. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There is no abnormal intracranial enhancement. The ventricles, sulci, and basal cisterns are unchanged in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable. There is minimal fluid within the left mastoid air cells.
Slight increase in the extent of cerebral white matter signal abnormality, which is nonspecific, but may represent chronic small vessel ischemic disease. Otherwise, no evidence of intracranial metastases or acute infarct. 