My husband has a large tumor in his chest. All that I can tell you is you may not feel anything unusual until the tumor is large. This is what happened in his case. If you're concerned about chest pain, see your doctor and insist on an X-ray. There are many things that can cause chest pain. I myself have dealt with Anxiety Attacks and that can cause chest pain, but it isn't life threatening. You may want to look at your diet/lifestyle/stress management. Good luck to you and stay healthy!