Is lung cancer contagious

In the past 50 years, the incidence and mortality of lung cancer have increased rapidly in countries around the world, especially in industrially developed countries. Lung cancer has ranked first among male cancer patients. Next, let's find out whether lung cancer is contagious.

Infection means that a disease is transmitted from one person to another through some means. Infection must meet three conditions: the source of infection, the transmission route and the susceptible population. Clinical data prove that cancer patients themselves are not the source of infection.

In the past, everyone believed that "lung disease" was contagious, and this "lung disease" was tuberculosis. Patients with tuberculosis are called open tuberculosis when their sputum is positive for bacteria, which is contagious. Therefore, patients with cough, sputum, and blood in their sputum should pay attention to disease prevention. Tuberculosis is a disease transmitted through the respiratory tract, while lung cancer is different from tuberculosis. Lung cancer is a malignant tumor that loses its normal cell morphology and dynamics due to the abnormal proliferation of local cells under the action of various different carcinogenic factors. Cancer cells discharged through sputum rapidly degenerate and necrotize due to the evaporation of sputum water and other reasons. Even fresh sputum requires various nutrients and specific conditions to make cancer cells grow and reproduce in vitro. Scientists often have to go through a lot of hardships to succeed in cultivating a living cancer cell, so cancer is not contagious.

In animal experiments, tumor-bearing animals were kept together with non-tumor-bearing animals for a long time, and no direct transmission was found. In some families, multiple people have lung cancer or other tumors one after another. This may be related to the fact that family members share the same genes and they may be in the same carcinogenic environment, such as smoking, exposure to radioactive substances, etc., so family members can develop malignant tumors one after another.

In summary, lung cancer is not an infectious disease and is therefore not contagious. I hope this helps everyone. Experts suggest: If you have any abnormal symptoms, please go to the hospital in time to avoid delaying the disease. If you still have questions, please consult our online doctors, who will give you detailed answers. Feihua Health Network wishes you good health!

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