Certainly giving a "right" answer in such complicated cases is very complex and puts us in a position to say "right" (what we read in books and learn during the race) or if we give a personal opinion that gives us a A criterion learned during the practices of medicine for so many years and many examples lived. I have always said that it is best to tell the truth, so it hurts, because it is the only thing that can resolve doubts or anguish, yes, in cases like the example of lung cancer, you should have a lot of tact when talking to him Patient or family members. Many times the patient only seeks to stop someone from turning the matter around and finish telling him what the reality of the matter is and what they should do, what are their risks and possibilities of everything going well. In conclusion, the truth lies in you, in your learned knowledge, and lived experiences, be as clear as possible but without offending or hurting succeptibilities. Good job Doctor! I send you a hug!