Stage IVa lung cancer. There is no evidence of intracranial hemorrhage, mass, or acute infarct. There are mild scattered nonspecific cerebral white matter T2 hyperintensity. There is no abnormal intracranial enhancement. There is mild diffuse cerebral volume loss. 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.
No evidence of gross intracranial metastases. 