摘要
What is colorectal cancer?Colorectal cancer is found in the lower digestive tract(rectum and colon)and is a common and lethal disease.The lifetime incidence is 4.5 percent with around 90 percent of cases occurring after the age of 50.Since there is no efficient treatment for end-stage colorectal can・cer patients,it is essential to detect early-stage cancer or pre-cancer lesions.
