Theresa,
I am a firm believer in not listening to the time line posted for NSCLC. These time lines are from a long time ago. There is a site with more survivors with stage 4 then you can imagine and to not treat your sister-in-law aggressively is a shame. A second opinion is needed and now. There are many people living with stage 4 NSCLC. If you want to see for yourself go to this web site and see how many just on this web site. Please please tell your sister in-law to get a second opinion. My prayers are with all of you.
http://lungcancer.clinicahealth.com/topics.pl
God Bless
Michele