Metastatic lung cancer to brain treated with whole brain RT. There are post-treatment findings related to right parietal metastasectomy. There is confluent T2 hyperintensity and susceptibility effect upon the surgical margins, but evidence of recurrent tumor in this region. There is interval decrease in size of the left superior frontal gyrus and right lingual gyrus lesions, which both measure 3 mm in width, previously 5 mm. There is a right lateral occipital lobe developmental venous anomaly. There is encephalomalacia in the right posterior cerebral artery territory and in right pons, where there is also punctate susceptibility effect. There is ex vacuo dilatation of the right posterior lateral ventricle. There is unchanged nonspecific diffuse cerebral white matter, left pons, and middle cerebellar peduncle T2 hyperintensity. There is no evidence of acute infarct. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are unchanged.
1. Post-treatment findings related to right parietal metastasectomy without evidence of recurrent tumor in this region.2. Interval decrease in size of the left superior frontal gyrus and right lingual gyrus metastases.3. Chronic right posterior cerebral artery territory and right pons infarcts.