Lung adenocarcinomas mostly originate from epithelial cells that secrete mucus from the smaller bronchial mucosa. Therefore, most adenocarcinomas are located in the surrounding part of the lungs and are spherical masses near the pleura. Female patients are more common and the age of onset is younger.

　　 accounts for about 20% of all types of lung cancer. Adenocarcinoma is not closely related to smoking, and some cases of cancer occur on the basis of lung fibrous scar lesions. Adenocarcinoma generally has no obvious clinical symptoms in the early stage, and is often found on chest X-ray examination. It is easy to be misdiagnosed as pleurisy, pleural effusion, tuberculosis, chronic bronchitis, pneumonia, cardiomyopathy, obstructive pneumonia, rheumatoid arthritis, arthritis, etc. About 80％ It is not clear whether the mass is a tumor or tuberculosis lesion, or just an inflammatory lesion.

　　Pulmonary adenocarcinoma can be divided into central type and peripheral type according to the location of the lesion. Those who grow in the common bronchus and bronchus hilum are called central type lung adenocarcinoma, accounting for about 70％ And undifferentiated cancer are more common. Lung adenocarcinoma that grows after the bronchus and its branches is called peripheral type, about 30%. Adenocarcinoma is more common. Lung adenocarcinoma can be divided into phosphorous cell carcinoma, adenocarcinoma, adenosquamous carcinoma, and large cells according to pathology. Carcinoma (undifferentiated carcinoma), small cell carcinoma (SCLC), carcinoid.

　　Adenocarcinoma is a type of lung cancer. Medium differentiation indicates that the degree of malignancy is a bit high. In addition to surgery and radiotherapy and chemotherapy, it is best to eat all-round and multi-level anti-cancer drugs. The cell''s evasion mechanism fails.

　　Medium-differentiated adenocarcinoma cells have a low degree of differentiation. Medium differentiation refers to the degree of growth and differentiation of cancer cells. The higher the degree of differentiation, the closer to normal cells! If the degree of differentiation is low, the prognosis is generally poor. It is recommended that timely surgical treatment should be performed without delay. It is recommended that chemotherapy be followed by surgery.