Lung cancer cells invade the healthy lung tissue and destroy it. Additionally, lung cancer cells can break off and spread (metastasize) to other organs in the body. 

When lung cancer cells invade another organ, such as the liver, those cancer cells in the liver are lung cancer cells not liver cancer cells. This is important to remember because your treatment will be tailored to treat lung cancer cells.

There are different types of lung cancers. Each lung cancer cell has a distinctive look when viewed by microscope. Lung cancer is divided into two major types: Non-Small Cell Lung Cancer (NSCLS) and Small Cell Lung Cancer.