In his efforts to determine why I was experiencing "dizzy" spells, my neurologist ordered x-rays of blood circulation through my neck to my head. Soon after, I got a call from my primary physician telling me I needed to see him right away. He wouldn't tell me why on the phone. When he saw me the next day, he said the x-ray of my neck had been low enough that the radiologist saw cancer in an upper lobe of my left lung. At age 79 and never having smoked, I was of course surprised. Fortunately the adenocarcinoma was in its early stages, and a surgeon was able to remove it all. That was November 2011, and now I am checked annually and still cancer-free. I had had no symptoms whatsoever. I have thanked that radiologist personally, and I know how lucky I was.