I write to suggest that everyone go to their primary care physician for an annual examination and to insist that a CT scan is performed each time you go.
This year my annual CT scan revealed a nodule growing in my lower lung. A follow up CT scan six months later showed that it had grown. Soon thereafter I had a PET scan which revealed that the nodule is not malignant, so we will just keep an eye on it.
The moral of the story, and the reason I am posting about this, is that without the yearly CT scan I would never have known the nodule was there and if it were malignant i'd probably have found out about it way too late.
So please, get a physical exam each year and tell your doctor that you want a torso CT scan.
It could save your life.