Bob, I am sorry to hear about your friend. What a bitter blow.
My only nearness to this is that I play the flute in church and am often reminded of a concert flutist of my acquaintance who passed away from lung cancer without ever having smoked. I met her in the same church, when she came to promote organ and tissue donation. A lung transplant saved her life, but she was diagnosed with the same type of cancer in her new lungs and finally lost her battle. She comes to mind -- that vibrant and talented young woman -- [i]every[/i] time I pick up my flute in church. She's part of the reason I began to think more seriously about quitting. I'm doing this for my own health, but it's a terrible thing to see her face in my mind, knowing that she got the diagnosis I've been inviting for many years.
At any rate, I'm very sorry to hear about your friend, and will keep a good thought for your strength as you stand by him during this time.
Burke