My dad has been experiencing pain in his back radiating down to his right arm for about one month now. Very much like a Pancoast tumor. After the first 2 weeks of pain, he went and got a chest X Ray which showed nothing. They said it was probably just a pinched nerve and gave him some steroids (Prednisone), but after another 2 weeks the pain didn't get any better. He went for an MRI of the shoulders, neck, and head, his doctor once again found nothing. They handed the MRI results to a very good Neuro Surgeon who spotted a herniated disc in the upper back/neck area. I'm probably going to sound really paranoid saying this, but whatever. Is there any chance it could be a Pancoast Tumor? My dad's dad was a smoker, but he said he stayed away from the smoke in his childhood and moved out when he was 18. Also, could a Pancoast tumor cause a herniated disc, or am I being overly paranoid?