How long a patient with sigmoid colon cancer really lives depends on whether it is found in the early or late stages of sigmoid colon cancer. Generally, patients in the early stages of the disease can have a better survival period, while those in the late stages have a shorter survival period. Sigmoid colon cancer is a kind of malignant tumor that occurs in the sigmoid colon. For patients with early stage of sigmoid colon cancer, resection surgery can be performed endoscopically, and after the surgery, patients can usually get a better survival period, and the 5-year survival rate can be more than 90%. For the middle stage sigmoid colon cancer patients, radical surgery of sigmoid colon cancer can be done under laparoscopic or open abdomen, and adjuvant chemotherapy can be performed, and the 5-year survival rate of these patients can be up to 60%-70%. For patients with advanced sigmoid colon cancer, they should try their best to fight for the chance of surgery. If surgery is not possible, chemotherapy and other methods can be used to alleviate the symptoms of the patients, and palliative surgery can also be used to alleviate the obstruction, bleeding and other complications of the patients, and the 5-year survival rate of these patients is only 10-20%. If diagnosed with sigmoid colon cancer, please follow the doctor’s instructions for treatment, be positive and optimistic, and adjust your mood.