Lung cancer and brain metastases surveillance. There are postoperative findings related to right frontoparietal craniectomy and cranioplasty with confluent T2 hyperintensity, but no discernible nodular enhancement in the treatment bed. However, there is interval increase in size of the peripherally enhancing mass in the left occipital lobe that measures up to 20 mm, previously 15 mm, with surrounding confluent T2 hyperintensity. There is an unchanged background of mild cerebral white matter T2 hyperintensity, which is nonspecific. There is no evidence of intracranial acute infarct. The ventricles and basal cisterns are stable in size and configuration. There is no midline shift or herniation. The enhancing lesion in the squamous portion of the right temporal bone with a cortical defect appears to be unchanged. There is extensive hyperostosis frontalis.
1. Interval increase in size of the previously radiated left occipital lobe metastases and associated vasogenic edema.2. The metastasis in the squamous portion of the right temporal bone with a cortical defect appears to be unchanged.3. Post-treatment findings in the right frontal lobe without evidence of recurrent tumor in this area.