KI67 is a proliferating cell-associated antigen that is closely related to cell mitosis. Lung cancer KI67 <10% indicates that the cancer cells are less actively proliferating, i.e., normal. No study has shown that the specific value of KI67 in lung cancer can be used as an indicator of malignant grading. Lung cancer KI67 of 10% indicates inactive proliferation of cancer cells, slower development and better prognosis.Ki67 is a proliferating cell-associated nuclear antigen, which is mainly used in the examination of tumors to determine the degree of malignancy of tumors.The higher the value of Ki67, the more active the proliferation of cells, the faster the tumor grows, and the worse the differentiation of tissues. The higher the Ki67 value, the more active the cell proliferation, the faster the tumor growth and the poorer the tissue differentiation. KI67 is used as an auxiliary indicator for lung cancer, and cannot directly diagnose the malignancy of lung cancer. Please cooperate with your doctor to carry out relevant pathological examination to clarify the specific pathological type and malignant degree of the tumor.