My sister has stage 3b almost 4 lung cancer the last week or so she a rattle when sleeping and her stomach is extended. What is happeningIt is a very large mass behind the heart ect,  she has gone threw 30 radiation &now doing chemotherapy.  Is true that this might extended her life but we most likely willnt get much more time with her She has also developed. Blood clots
Hi and welcome to Chat Doctor. Well, this is obviously terminal malignant disease. This mass can be tumor or lymph nodes enlargements. Whatever it is it isn't good sign. It is always hard to predict life expectancy. Statistics say 3-6 months, but it depends on form case to case and her general shape. The mots important is her lung and heart function. Chemo is considered to prolong life for 6months-1year, but it is always doubtful can patient bear it and will it have effect. In terminal stages when life expectancy is less than 2 months it is not advisable to go through chemotherapy. Wish you good health.