After reading my chest x-ray today of both of my lungs my physician called to ask me to have a CT scan as soon as possible. Today's X-ray showed 1.5 centimeter spot or lump or mass in my left lung. I've never smoked - very healthy 77-year old lady. The radiologist (dr. reading the x-ray) said he thought this spot could possibly be from scar tissue? My primary care doctor suspects the same. However, they are not sure. Can I have your considered opinion.