A pneumonectomy is a type of surgery to remove one of your lungs because of cancer, trauma, or some other condition.

You have two lungs: a right lung and a left lung. These lungs connect to your mouth through a series of tubes. Through these tubes, the lungs bring oxygen into the body and remove carbon dioxide from the body. Oxygen is necessary for all functions of your body. Carbon dioxide is a waste product that the body needs to get rid of. Most people can get by with only one lung instead of two, if needed. Usually, one lung can provide enough oxygen and remove enough carbon dioxide, unless the other lung is damaged.