Colorectal cancer

Colorectal cancer refers to malignant lesions of the large intestinal mucosa epithelium under the influence of various carcinogenic factors such as environment or genetics. It has a poor prognosis and a high mortality rate. It is one of the common malignant tumors in China. Among them, the malignant tumors arising from the mucosal epithelium are collectively called colorectal cancer, and are the most common malignant tumors of the gastrointestinal tract. Those originating from mesenchymal tissue are called sarcomas, which account for about 1% of malignant lesions of the large intestine. The average 5-year survival rate after surgical resection can reach 40% to 60%. Early detection, early diagnosis, early treatment, and standardized surgical treatment are still the keys to improving the efficacy of colorectal cancer.