I had a cat scan that showed a nodule in the right lung that also showed calcification. I am following up with a pulmonologist to show him the scan and chest xray. I originally went to the doctor because i was getting a very quick sharp pain under my sternum toward my right side. It doesn't last more than a second or so.That is what started the whole thing. I'm trying to get more info with regard to the nodule and what it could indicate.