What is lung cancer?
- Lung cancer is cancer that's found in one or both of your lungs.
- The lungs are an organ in your body that help you breathe.
- How serious lung cancer is depends on how big the cancer is, if the cancer has spread, and your general health.
- Lung cancer is one of the most common types of cancer in the UK.
- Lung cancer screening can pick up lung cancer early, which may mean it's easier to treat.
Page last reviewed: 20 August 2026
Next review due: 20 August 2029