The five-year survival rate of adenocarcinoma in situ of lung is high, which may reach 100%, but the possibility of recurrence and metastasis cannot be ruled out. 1. Post-operative residual: the treatment of adenocarcinoma in situ of lung is mainly surgery, which should remove the tumor lesions to the maximum extent, but the possibility of residual tumor cells, which may exist in lymphatic vessels or blood vessels, cannot be ruled out, and the residual lesions may recur or metastasize. 2. Internal environment: whether the internal environment of the patient’s body is improved after treatment will also affect the recurrence and metastasis of the tumor, if it is not improved, the tumor cells may continue to breed and grow, thus recurring or metastasizing. It is recommended that patients with adenocarcinoma in situ should have regular postoperative review and physical examination on time to observe whether there is any new tumor in the lungs.