Lung cancer is one of the malignant tumors with the fastest increase in morbidity and mortality, which poses the greatest threat to human health and life. In recent 50 years, many countries have reported a significant increase in the incidence and mortality of lung cancer. The morbidity and mortality of male lung cancer ranks first among all malignant tumors, and the morbidity and mortality of female lung cancer ranks second.

The probability of lung cancer among long-term smokers is 10 to 20 times that of non-smokers. The younger you start smoking, the higher your risk of lung cancer. In addition, smoking not only directly affects my health, but also has a negative impact on the health of the surrounding people, leading to a significant increase in the incidence of lung cancer among passive smokers.

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The concept of cancer prevention:

1, primary prevention is to eliminate or reduce possible carcinogenic factors and prevent the occurrence of cancer. About 80% of cancers are related to the environment and living habits. Improving living habits, such as quitting smoking, limiting alcohol, diversifying diet, eating less pickled food, controlling weight, exercising properly, paying attention to environmental protection, identifying carcinogens and promoters in the environment, and strengthening occupational protection, are all important anti-cancer measures.

In recent years, immune prevention and chemical prevention belong to primary prevention, such as large-scale inoculation of hepatitis B vaccine and chemoprevention of colorectal adenoma with selective cyclooxygenase -2(COX-2) inhibitor.

2. Secondary prevention refers to how to find and treat cancer at an early stage after the occurrence of cancer. Including:

(1) Identify and pay attention to cancer risk signals (such as persistent dyspepsia, postmenopausal vaginal bleeding, changes in defecation habits, persistent ulcers, etc.). );

(2) Regularly check high-risk areas and high-risk groups;

(3) Detection of precancerous lesions and diagnosis and timely treatment of tumors;

(4) Strengthen the monitoring of susceptible population;

(5) self-examination of tumor; (Check the exposed parts of the body regularly).

3, tertiary prevention refers to the rehabilitation after treatment, to prevent the deterioration of the disease, improve the quality of life, reduce pain, prolong life.

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