Hi Tward,   I am sorry to hear about your Grandpa. I lost my grandfather to lung disease also. Only a few years ago. I don't know much more about it to be honest, but I just wanted to let you know that I am sorry to hear that your grandpa is going through this. There are many variables that will effect his life expentancy, and you will really need to talk to his doctor to get any realistic idea.  Without the medical details, anything we tell you is likely to be guessing. I'm also not sure how the side effects of chemo change with age.   -sch ... View more