The ki67 represents an indicator of the proliferation of malignant tumors, usually it does not have a normal value and the ki67 value of stage 1a lung adenocarcinoma may range from zero to one hundred percent. ki67 is a nuclear protein that indicates the rate of growth and proliferation of tumor cells. Clinical staging of tumors is not directly related to the Ki67 index. Regardless of whether the tumor is early or advanced, the Ki67 index may be between zero and one hundred percent, so there is no referable ki67 value for stage 1a lung adenocarcinoma. Generally speaking, the larger the percentage of Ki67 indicator, the faster the tumor grows, the faster the cell proliferation, the higher the degree of malignancy of the tumor, the more invasive, and the more likely to metastasize to other tissues of the body. ki67 indicator is also used as a relative reference for doctors when they formulate the treatment plan for the patients. It is recommended that patients relax their mindset during the treatment process, do not over-interpret the examination report to avoid psychological burden, and communicate with the attending doctor if they do not understand the examination results or treatment plan.