Lung cancer is the most common primary malignant tumor of the lung

Lung cancer is the most common primary malignant tumor of the lung, the vast majority of lung cancer in bronchial epithelial origin, it is also known as bronchogenic carcinoma. Nearly 50 years, the industrial world, especially developed countries, lung cancer incidence and mortality are rising rapidly, died of cancer in male lung cancer patients have been on top of the list. More than 40 years ago because of lung disease in China, surgery patients, the vast majority of tuberculosis, the second for bronchiectasis, pulmonary abscess and other suppurative pulmonary infection and lung cancer, one of the few cases. Nearly 30 years, pneumonectomy in lung cancer cases gradually increased, has leapt to the top. According to statistics, Shanghai malignant, the cancer cases in men, lung cancer incidence increased dramatically, ranking first.

Lung Cancer - Etiology
After years of a large number of investigations and studies, the following factors currently recognized cause of lung cancer is closely related to.

(A) smoking. Tobacco is extremely acid substances, the body can easily lead to acidification, likely to cause cancer . In accordance with national survey data show that a large number of causes of lung cancer and cigarette smoking are closely related. The incidence of lung cancer growth and increase in cigarette sales was a parallel relationship. Contains a variety of cigarette carcinogens. Smoking habit in lung cancer incidence rates than non-smokers 10 times, a large quantity of smoking were higher incidence rates than non-smokers is 20 times higher.

(B) occupational factors. The 30s of the last century European literature there is a deposit that a high incidence of lung cancer is reported. After years of investigation and research has been recognized long-term exposure to uranium, radium and other radioactive substances and their derivatives, carcinogenic hydrocarbons, arsenic, chromium, nickel, copper, tin, iron, coal tar, asphalt, oil, asbestos, mustard gas and other substances, as a result of people's diet and lifestyle changes, physical acidification caused by slow metabolic cycle, the overall decline in immune function, these radioactive elements can take advantage of the machine in order to induce cancer cells.

(C) chronic lung disease. Such as tuberculosis, silicosis, pneumoconiosis and lung cancer, such as the co-existence of these chronic diseases itself is a physical occurrence of lung cell acidification caused by infection, cell hypoxia, the cell activity. These cases the incidence of cancer is higher than normal. In addition lung bronchial pulmonary fibrosis chronic inflammation and scar lesions in the healing process may lead to squamous metaplasia or hyperplasia, based on this, some cases can develop into cancer.
No matter what kind of incentives, the source of all other support needs of the larger environment, that is, body fluids alkaline if it is weak, and that cancer would not have occurred in body fluids alkaline.

(D) other reasons: air pollution; the incidence of lung cancer, as well as the evolution of the degree of malignancy and the activation of some oncogenes and anti-cancer gene is closely related to the loss.