Lung adenocarcinoma staging

Lung adenocarcinoma is a common type of lung cancer and is a primary malignant tumor of the lung. Lung adenocarcinoma can be divided into stage I, stage II, stage III, and stage IV. Among them, stage 1A to 2b are the early stages of lung adenocarcinoma. Surgery is the main method, and the five-year survival rate can reach about 70%; stage 3 lung adenocarcinoma is in the middle stage, and the five-year survival rate is about 30%; Stage IV lung adenocarcinoma means that it has shown distant metastasis, intrapulmonary metastasis or malignant pleural effusion. This kind of lung adenocarcinoma is no longer suitable for surgery and radical radiotherapy. It should be mainly treated by internal medicine, including chemotherapy, molecular targeted therapy drugs and immunotherapy, etc.