Is advanced lung cancer contagious?

Is lung cancer contagious? Based on our current understanding of lung cancer, it has been confirmed that lung cancer is not contagious. Contagion refers to the transmission of a disease from one person to another through some means. Contagion must meet three conditions: the source of infection, the route of transmission, and the susceptible population. Clinical data prove that cancer patients themselves are not the source of infection.

Cancer cells in the patient's body are a group of abnormal cells that have lost control and grow in an invasive manner. They not only destroy adjacent normal tissues and organs, but can also spread to all parts of the body through lymphatics and blood circulation, absorb a large amount of nutrients, grow and proliferate rapidly, and cause systemic failure of the patient until death.

Although cancer cells can spread or metastasize everywhere in the patient's body, they are not like bacteria and viruses, and lung cancer cannot be transmitted from one person to another. To oneself, other people's cancer cells are a kind of foreign body, and the body destroys cancer cells through its powerful immune rejection ability. Therefore, other people's cancer cells cannot survive in one's body.

From the perspective of infectious diseases, is lung cancer contagious? Lung cancer is not contagious, but some diseases before lung cancer are contagious, such as tuberculosis, which is a factor that causes lung cancer. Tuberculosis is an infectious disease. So it is too early to say that it is definitely not contagious. For example, the most typical liver cancer is caused by hepatitis, and hepatitis is definitely contagious.

This shows that cancer is generally not contagious.