to answer your question

my husband 1st had a brain tumor which was an adenocarsinoma with characteristic of spread from lung, but no primary was found. After surgery they radiated the spot. then another brain tumor showed up and that was successfully radiated. Finally in Dec. a small nodule in the lung showed PET active. It was radiated. Now they do chemo with Alimpta and Carboplatinum, 2-4 treatments 3 weeks apart.  Nancy