How is lung cancer diagnosed?
Your doctor will check your symptoms and ask questions about whether you smoke or have been exposed to any cancer-causing substances. He or she will also ask about your medical history, including any history of cancer in your family. This information will help your doctor decide how likely it is that you have lung cancer and whether tests are needed to be sure.
Lung cancer is usually first found on a chest X-ray or a CT scan. More tests are done to diagnose non–small cell or small cell lung cancer and to find out whether it is confined to your lung or has spread to other parts of your body. These tests help determine what stage the cancer is in.
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