Non-small cell lung cancer with brain metastasis. Presurgery (biopsy) planning. Limited exam, for stereotactic guidance. The numerous areas of poorly defined T1 shortening predominantly, previously proved to be partly hemorrhagic and partly contrast enhancing, involving the cortex but also the deep brain structures have not significantly changed since the previous examination, accounting for technique differences. Some areas of associated heterogeneous T2 signal are seen with the parenchymal lesions, consistent with blood products. Scattered subtle contrast enhancement on the surface of the cerebellum in the interfolial spaces represents leptomeningeal metastatic involvement and is again unchanged. They are not associated with mass effect, midline shift or herniation. There has been no other significant changes since the previous examination on this limited.
This study was obtained for surgical planning and shows no significant change when compared to the recent August 21, 2015 examination regarding the numerous parenchymal and leptomeningeal metastatic lesions.