Lung adenocarcinoma stage II means second stage, which generally does not belong to early stage and belongs to the category of middle stage of lung adenocarcinoma. Lung adenocarcinoma is a subtype of lung cancer, and according to international regulations, lung cancer is generally divided into four stages, namely, stage I, stage II, stage III and stage IV. For stage II lung adenocarcinoma, because the lesion has triggered the metastasis of lymph nodes and tissue invasion in the surrounding area, and the spread of lung cancer has occurred, therefore, stage II lung adenocarcinoma is generally judged as the middle stage of lung adenocarcinoma, not the early stage. Lung adenocarcinoma tends to occur in smokers, mostly induced by smoking history, air pollution and other factors. Lung adenocarcinoma symptoms are more diverse, such as localized wheezing and shortness of breath. Lung adenocarcinoma usually adopts surgical resection and targeted therapy according to the degree of disease. It is recommended that lung adenocarcinoma patients should go to regular hospitals for consultation and listen to professional doctor’s advice.