I'm sorry to hear that, Hildy. However, I hope you don't blame your mother for that. Our dear friend, who never smoked a day in his life, and didn't grow up in a home where there were any smokers and didn't live his adult life around smokers (he was a principal of a school) also died of lung cancer at the young age of 40.
Cancer has so many causes these days, and some are simply unexplainable.
I know...there was so much Cancer in my family. My father has prostate, bladder and Colon cancer, which is what he offfically died of. My mother had breast cancer, had a double mastectomy. Besides my brother who died of lung cancer at the age of 42, my other brother had skin cancer. He's ok, though. As for me, I don't wonder if...I wonder when.
Cancer is the body attacking itself.