That’s a gene test to see if you are vulnerable to cancer. This is a blood test to see if you have cancer right now.
Everybody in my family smoked except me. They were all chimneys. Both my parents and one sister died of lung cancer. My brother quit smoking after he had his first heart attack at the age of 48. Had he lived past 51 when he died of a second heart attack, he would have probably contracted cancer. My oldest sister who was an alcoholic, and was institutionalized most of her adult life, died of a stroke at the age of 74 in 2014. She'd outlived everyone else but me. I'll be 74 in August. Although I never smoked, I know there is still a possibility that I may contract cancer. My parents never had the benefit of chemo or radiation, but lung cancer will eventually kill you, no matter what treatments you take. My second oldest sister stopped smoking five years before being diagnosed with lung cancer. After seeing her go through radiation, chemo, more radiation, etc., I don't know if I'd even want to go through all that, put my kids through all of that, especially if it meant it would give me 6-18 more months. What's the sense?