Rectal malignancy generally refers to rectal cancer, and there is no data on how long one can live. However, the 5-year survival rate of those who are actively treated in the early stage reaches 90%, the 5-year survival rate of those who are actively treated in the progressive stage is 50-78%, and the survival rate of those who are in the advanced stage at 5 years is about 10%. The cause of rectal cancer is not clear, but it is considered to be related to heredity, improper diet, etc. There is no authoritative clinical data for the time being to show how long patients can live. If the patient is in the early stage of rectal cancer and actively cooperates with the doctor for surgical treatment, radiotherapy, etc., the 5-year survival rate usually reaches 90%. It is worth noting that some patients are prone to recurrence, and the risk of recurrence usually ranges from 1.2% to 4.9%. The 5-year survival rate of patients with rectal cancer in progressive stage, after aggressive surgical treatment, is between 50% and 78%, while the 5-year survival rate of patients with advanced stage will decrease, usually around 10%. However, for those who do not pay attention to the disease after diagnosis and actively cooperate with doctors for treatment, the condition will further aggravate and the 5-year survival rate will usually be smaller, which needs to be taken seriously. It is recommended that those who are diagnosed with rectal cancer should adjust their mindset and actively cooperate with doctors in order to control the progress of the disease and prolong the survival time.