The relationship between tuberculosis and lung cancer

TB is to develop into lung cancer: the clinical research data so far suggest that the incidence of tuberculosis and lung cancer have no direct relationship. Tuberculosis is caused by Mycobacterium tuberculosis infection of respiratory tract diseases, lung cancer is smoking, air pollution and lower the immune function of cancer-related diseases. However, the tuberculosis caused by chronic lung damage, affecting the bronchial epithelial viscosity of the body's normal immune function and anti-virus, and the incidence of lung cancer are indirect role in promoting, tuberculosis calcified lesions, tuberculosis scars, old hollow wall and bronchial , Alveolar epithelial cell proliferation, proliferation, such as lung cancer and the occurrence of a certain relationship. People suffering from lung cancer of the incubation period is very long, usually takes 10-30 years, suffering from tuberculosis when they are young, cured of lung cancer after a calcified lesions, and then some elderly patients suffering from lung cancer, clinical often found on old cases of pulmonary tuberculosis with lung cancer. If the activity of lung cancer and tuberculosis co-exist. More vulnerable to the diagnosis difficult. TB who are generally young, the elderly lung cancer patients who, but the current aging trend of TB in the country have shown, young patients with lung cancer are also increasing the ratio, when they exist, often due to the presence of TB lesions or sputum found Mycobacterium tuberculosis to the neglect of lung cancer diagnosis. Of patients with pulmonary tuberculosis, encountered the following situation should be highly vigilant against the possibility of the coexistence of lung cancer are: 1.40 over the age of male patients, have a long history of smoking; 2. There are irritating cough, persistent chest pain, shortness of breath, weight loss, symptoms and X-ray and a lesion does not match those of heavier; 3. Associated with pleural effusion, the rapid growth of pleural effusion, or even expand the video, or in other parts of the emergence of new lesions; 5.X-ray see a mass round and massive corporation, larger than 24 cm, a mass-fronds, a burr-like irregular edges, with hilar lymph nodes and lung is not Zhang.