Skip to Content
Veteran's Health Library Menu

Search

What Is Lung Cancer?

There are 2 main types of lung cancer:

Non-small cell lung cancer

Most cases of lung cancer are called non-small cell. There are a few different types of non-small cell lung cancer. These include squamous cell carcinoma, adenocarcinoma, and large cell carcinoma.

Small cell lung cancer

Small cell lung cancer is less common than non-small cell lung cancer. Small cell cancer is sometimes called oat cell cancer. (The cells are shaped like oats when viewed under a microscope.) This type of lung cancer may grow and spread faster than non-small cell cancer.

Outline of male figure with arrows showing lung cancer spreading to liver, other lung, bone, and brain.
Lung cancer can spread to the other lung, the liver, brain, or bones.

How cancer spreads

Cancer cells don’t always stay in one place. Cancer cells can break off from the place they started. They can spread to other parts of the body if they enter the bloodstream. They can also spread if they enter the lymph system. The lymph system is a network of nodes and vessels that help your body fight disease. When cancer spreads, the process is called metastasis. Lung cancer that spreads (metastasizes) often goes to the other lung or the liver, brain, or bones.

Author: StayWell Custom Communications
Last Annual Review Date: 9/1/2022

Helping Veterans stay
well-informed.

Take a tour

My HealtheVet

Visit My HealtheVet to get your personal health information.

Link to My HealtheVet

Veterans Crisis Line DIAL 988 then Press 1

Bystander Intervention
Training for Veterans

Learn what to do if you witness harassment or sexual assault.

Learn More

Here is a brief survey to
help improve this website.

Tell us what you think.
Disclaimer - Opens 'Disclaimer' in Dialog Window | Help | About Veterans Health Library