Hi, You said you have stage four lung cancer, when were you diagnosed? my mom is at stage four and has tried three different chemos and is not responding. the doctor wants her to finish up this last chemo and then try tarceva. did anyone give you a time frame of life expectancy at stage four? we are so scared that she will not respond, but I have a good feeling about Tarceva. thank you and wish you well, anxious to here from you Janice