How long you can live with 90% KI67 positivity cannot be generalized and should be judged based on the patient’s specific condition and treatment. KI67 is a protein encoded by MKI67 gene, which is an essential component for cell proliferation and is also related to ribosomal RNA transcription, with a normal value of 0. This indicator can be used to determine the malignancy of malignant tumors and the sensitivity of chemotherapy, and the higher the positive rate indicates more cells in the proliferation cycle, higher malignancy, faster tumor growth and faster disease progression. If the tumor is not treated effectively in time, the patient’s life expectancy will be greatly affected. However, it has also been found that most of the tumors with high KI67 positive rate are sensitive to chemotherapy, and they can generally obtain good results after active chemotherapy, which can not only relieve patients’ pain, but also prolong their survival time and improve their quality of life to a certain extent. In conclusion, how long can a patient live with a high KI67 positive rate varies from person to person. Patients should adjust their mindset after the examination and actively cooperate with doctors to help prolong their survival.