The following is a set of questions and answers about lung cancer genetic counseling: Q: In 2012, my grandmother (79 years old) was diagnosed with mid- to late-stage lung cancer. Grandpa has a brother who is in good health and is 89 years old. Grandma, aunt and grandpa have been diagnosed with lung cancer one after another within three years. Doctor, is this a family cancer like ours? I would like to ask for your help, thank you very much. A: Your three second-degree relatives have cancer, all of them are above 50 years old, and most of them are of advanced age. The cause of the disease should be mainly environmental factors, and the blood relationship with you is not the closest level, so the genetic susceptibility is not very strong; but after all, three of your close relatives have cancer, so you should increase your awareness of cancer prevention and observe a healthy lifestyle. Q: Thank you very much for your reply. I have recently read online articles about mental factors causing cancer. A: Mental factors are one of the important etiological factors of cancer. The phenomena you mentioned are all bad mental factors, which should be taken seriously. Answer: Thank you for your selfless answer, good people live in peace.