Hi, I hope someone in this group can direct me to the right group because I did not see a group for Lung cancer. My 77-year-old husband has stage 4 lung cancer. He is wondering why his CEA markings have gone up so fast since last test, 3 months ago. He has never had chemo, only had radiation 4 years ago. Can someone tell me a reason why his CEA markings have gone up? Thank you in advance! Any thoughts would be appreciated!