Microinvasive lung adenocarcinoma has a low recurrence rate and belongs to lung cancer with very good prognosis. Microinvasive lung adenocarcinoma is a very early stage lung cancer, and the cure rate is very high if it is surgically removed in time. Microinvasive lung adenocarcinoma may also have the possibility of metastasis along submucosal capillaries and lymphatic network to the surrounding and distant places, so it has a certain probability of recurrence and metastasis. Therefore, after surgical resection of microinvasive lung adenocarcinoma, it is necessary to follow up and review on time to find out recurrence and metastasis and deal with it in time. Although microinvasive lung adenocarcinoma has a better prognosis, it is difficult to be detected and often has no special clinical symptoms, so it needs to be detected through screening.