Are very common, and most (>95%) are not cancer. The larger the nodule
, the greater the probability of cancer. Nodules in the 4-5 mm range are rarely lung cancer
, and a nodule that is 25 mm in size (about an inch) is 50-50, and so on.
These odds are affected by your age, and whether you smoked or not. Most nodules simply require long term follow up out to two years, with some exceptions.