Kdaru,
Am praying for your Dad that the other nodules aren't cancer. Sometimes an old pneumonia or other infection shows up. I had a medianastinoscopy didn't show any thing in the mediastum, then when I had lung surgery, they did find a malignant node in the chest. I was so disappointed. But I am still feeling okay and it has been nine months since surgery. I was diagnosed at Stage IIIA. I have known several people who lived quite a long time with Stage IV so don't give up hope. I think that there were even some on the site who had treatment in that stage. Prayers and hugs for you and your Dad.
Sharon