Most commonly, doctors suspect somebody might have lung cancer when they see something on an imaging test such as a CT scan that looks like it could be a tumor. Lung cancer doesn't always cause symptoms in the early stages. Sometimes patients don't have any symptoms at all. Diagnosing lung cancer is a process that involves not just detecting lung cancer but understanding how much it has spread and testing for biomarkers—information that can help determine your best treatment plan.
Page last updated: November 17, 2022