Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Lung cancer is a type of cancer that starts in the lungs and can spread to other parts of the body. It is primarily caused by smoking, but can also be caused by exposure to secondhand smoke, radon gas, asbestos, and other harmful substances.
Related terms
Carcinogens: Carcinogens are substances or agents that have the potential to cause cancer. They can be found in tobacco smoke, certain chemicals, radiation, and some viruses.
Radon gas: Radon gas is a radioactive gas that comes from the natural breakdown of uranium in soil and rocks. Prolonged exposure to high levels of radon can increase the risk of developing lung cancer.
Asbestos is a group of naturally occurring minerals that were commonly used in construction materials due to their heat resistance and durability. However, prolonged inhalation of asbestos fibers can lead to lung diseases such as lung cancer.