I have 21 ground glass nodules between both lungs. My first CT scan was over ten years ago. I do have a pulmonologist and at first she ordered a yearly scan and after all these years since nothing has changed or grown it is now every two years. I will be 83 in two weeks. I do have CVID which is a form of primary immunodeficiency and have to give myself infusions of blood plasma gammaglobulin to get other people's antibodies to fight virus and bacteria. People like me have all sorts of strange things. For a broad of my age and having a rare disorder I'm pretty healthy. I try to walk a couple of miles a day. I am just full of osteoarthritis. I try not to think about what's going on in my lungs until it's time for my scan then that's all I think about.