摘要
Colorectal cancer(CRC)has always been one of the most common malignant tumors in the world,and the incidence and mortality have been on the rise in China.The Cancer Statistics Report of China in 2020 showed that the incidence and mortality of CRC ranked second and fifth among all malignant tumors,with 555,000 new cases and 286,000 deaths,respectively.Among them,cities were much higher than rural areas,and the incidence of colon cancer had increased significantly.Most patients were already in the advanced stage at the time of diagnosis.
