Metastatic NSCLC: left lower extremity weakness. There is a new peripherally enhancing mass in the right superior frontal gyrus that measures up to 30 mm and is surrounded by vasogenic edema. There is a small amount of susceptibility effect within the tumor, which may represent blood products. There is no evidence of acute infarct. 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. There is a new enhancing lesion in the midline occipital bone that measures up to 20 mm. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable. There is a small amount of fluid in the left mastoid air cells. However, there is an unchanged cystic lesion in the skin adjacent to the right eye, which may represent a hydrocystoma. There is also a nonspecific punctate nodule in the left preauricular skin.
New metastases in the right superior frontal gyrus and occipital bone. 