Thank you for posting. I¿m afraid I just can¿t say what the chances are of these nodules being cancer. I don¿t know how much has been explained to you by the lung specialist.
Based on what they know about your circumstances, a doctor may be able to estimate what your risk is of these being cancerous. But even the doctor may not be able to know for sure.
I can give you some general information about lung nodules and I hope this is helpful. CT scans of the chest commonly detect lung nodules that are not always seen on a chest X-ray. In some people, nodules are found incidentally when they have a scan for something else and they do not usually cause symptoms.
Most nodules are not cancer (benign) and could be due to other conditions, for example past infection with TB (tuberculosis). So if the nodule is small, doctors often choose to keep an eye on it by repeating the CT scan. The doctor considers a number of factors when deciding whether someone should be monitored. These include the size and appearance of the nodule, the age of the person and whether they are smokers, or have ever been smokers. These factors will also determine the frequency of the scans and how long they should carry on for. Benign nodules do not grow, or grow very slowly. So if any the nodules become bigger, the lung specialist may arrange for other tests such as another type of scan, a biopsy, or sometimes surgery.
I appreciate that this can be a worrying process for people to go through, particularly when the time is approaching to scan again The benefit is that cancer may never be found and (although people have regular CT scans) they will have been saved from further tests that would not have been necessary.
If a person is diagnosed with cancer, there is a possibility that this may be cancer that has spread from elsewhere in the body (I don¿t know how often this happens). Or, as you say, it could be lung cancer.
I¿m sorry I can¿t be more definite, but hope this is useful.