Doctors will take note of any possible lung cancer symptoms that you have and then conduct a physical examination. If they still believe that a lung cancer tumor is to blame for your symptoms, they’ll likely use imaging scans to look inside your body.
Then, they’ll conduct a biopsy to extract a sample of possibly cancerous fluid or tissue. The biopsy will be sent to a lab, where pathologists will look at it under a microscope and see if lung cancer cells are present. If so, doctors will confirm that your symptoms are indeed caused by lung cancer.