@merpreb, I'm ambivalent about a work-up because I feel the docs are good at finding problems but not in providing remedies. So if I just get a poor diagnosis and no medical solution it would dampen my desire to continue with the high intensity work-outs that I put myself through. On the other hand, maybe they have something new that can help me with my exercise program making it a little easier.
The x-ray is my primary doc's suggestion. I'm guessing the x-ray is just a follow-up from the pneumonia and not a cancer screening. The cancer screening question I asked earlier was prompted by a medical program I was listening to. It had nothing to do with my x-ray (although I'm guessing that an x-ray would pick up a tumor?)