don't be scared!!! I was dx with stage 3b lung cancer. My tumor was wrapped around my superior vena cave artery causing it to become almost completly closed. After 15days of chemo 35 days of radiation in a 6 wk period, my tumor has shrunk to almost nothing and my SVC is back to normal. From the day I was dx, I took 1 day at a time, and kept saying "IT IS WHAT IT IS" I kept thinking things could be worse... I could have died instantly of a heart attack, or an accident, but I have been given a chance to beat this, and every day is another day to live for, and enjoy. As you get your treatment, just keep telling your chemo or radiation to " EAT THAT STUFF AWAY"