The specific time for breast cancer to become advanced stage usually depends on the development of the disease and the physical condition of the individual, which can be as short as a few years and as long as a few decades, so it is not possible to make a generalization. 1. Slower development: if the patient’s condition develops slowly, and actively cooperates with the doctor to carry out appropriate treatment, follows the doctor’s instructions during the recovery process, and there is no spreading of cancer cells, then the time to become advanced stage may be relatively long, and it may take several decades, or it may be cured for a long time. 2. Rapid development: If the patient’s condition develops rapidly and is not treated in time, and the cancer spreads, the time to become advanced stage may only be a few years or shorter. It is suggested that patients should seek medical treatment in time and keep their mood relaxed, which can help them recover from the disease.