Squamous cell lung cancer. There is a linear area of high T2 signal that extends from the posterior limb of the left internal capsule into the corona radiata without associated restricted diffusion. There are also mild scattered foci of T2 hyperintensity in the cerebral white matter elsewhere without restricted diffusion. There is no evidence of acute intracranial hemorrhage, mass, or acute infarct. There is no abnormal intracranial enhancement. 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 skull, paranasal sinuses, and scalp soft tissues are unremarkable.
Linear area of high T2 signal that extends from the posterior limb of the left internal capsule into the corona radiata without associated restricted diffusion may represent a prior lacunar infarct. Otherwise, no evidence of intracranial metastases, hemorrhage, or acute infarction.