Invasive lung adenocarcinoma 8cm is a more serious case. Even if invasive lung adenocarcinoma 8cm does not have regional lymph nodes and distant metastasis, the clinical stage of the patient already belongs to stage 3, which is the middle to late stage of lung cancer, so the cure rate is not high. Moreover, 8cm is a relatively large lung adenocarcinoma, which is difficult to be resected by radical surgery, and the postoperative trauma to the lungs is relatively large, so it takes a long time for the patient to recover. If invasive lung adenocarcinoma 8cm is accompanied by regional lymph node metastasis or distant metastasis, the condition of the patient is even more serious, and some of the patients can no longer undergo radical surgical resection, and they can only follow the doctor’s instruction to take chemotherapy, radiotherapy, targeted, immunotherapy and other medical treatments, so as to prolong the patient’s survival period.