My 77 year old father in law has non-small lung cancer. He was diagnosed 9 years ago. He also has the EGFR mutation and had success with Tarceva for two years. Now he was diagnosed with brain mets and having whole brain radiation. He also has two tumors in his abdomen. The gene mutation there is T790M. The doctors do not have any options for him. Does anyone have any information to share with us about this mutation? Thank you!