What is lung cancer? What are the causes?

Lung cancer is a malignant tumor disease that occurs in the bronchial mucosal epithelium. It is more common in men and is prone to bone or lymph node metastasis. The disease is mainly caused by long-term heavy smoking, and is also related to genetic inheritance, exposure to adverse environments, and chronic lung infections. It can cause irritating dry coughs, chest tightness, shortness of breath, dyspnea, and other adverse symptoms.

Lung cancer is a type of malignant tumor, and its incidence has been on the rise in recent years. It is undeniable that lung cancer has a high mortality rate, which can easily threaten the patient's life safety. Therefore, it is best to strengthen the understanding of the disease so that effective and scientific prevention and treatment can be actively carried out. So what is lung cancer specifically?
1. What is lung cancer ? Lung cancer is a malignant disease that occurs in the bronchial mucosal epithelium. It ranks first among male malignant tumors, and its incidence in women is also increasing rapidly. The likelihood of developing lung cancer increases with age. Lung cancer is very harmful and may gradually metastasize to bones or lymph nodes, so it should be taken seriously.
2. Causes of lung cancer
1. Smoking <br/>Long-term heavy smoking will cause adverse stimulation to the bronchial epithelium, leading to cancerous changes in its cells, which will then become a high-risk factor for lung cancer. This is mainly because tobacco contains nicotine and benzopyrene, which are harmful substances with carcinogenic activity, which may change the molecular structure of cells and cause malignant changes in the lungs.
2. Genetic inheritance <br/>Genetic inheritance and other congenital factors are a major factor in inducing lung cancer. Especially for people with a family history of the disease, the possibility of developing lung cancer will be greatly increased. It may be caused by gene or chromosome mutation, but it is not yet clear which genes are mutated.
3. Other reasons <br/>Lung cancer is closely related to occupational and adverse environmental exposure. Long-term exposure to radioactive substances will also increase the possibility of lung cancer. In addition, chronic lung infections, such as tuberculosis, will metaplasia into squamous epithelium, thus causing lung cancer.
3. Clinical manifestations of lung cancer <br/>Lung cancer generally has no obvious symptoms in the early stage of the disease, and then symptoms such as irritating dry cough, shortness of breath, chest tightness, fatigue and weakness may gradually appear. At the same time, coughing up blood may occur. When the respiratory function is affected, it may cause difficulty breathing or respiratory failure, and the lung area will be accompanied by obvious pain and discomfort.