国家癌症中心2019年发布的数据显示，我国结直肠癌的发病率及死亡率均呈上升趋势，主要与我国结直肠癌基本诊疗规范落实欠缺，整体诊治水平偏低有关。特别在基层级医院，由于各种资源配置相对落后，无法完全按照国际诊疗指南进行诊治，医疗水平参差不齐。鉴于县域级医院是多数结直肠癌患者的首次就诊单位，需要服务的人群基数大，制定适合于县域级医院的结直肠癌诊疗指南，提高基层医疗服务质量尤为重要。为此，中国医师协会结直肠肿瘤专业委员会内科治疗专委会起草、讨论并最终发布2019中国Ⅱ、Ⅲ期结直肠癌县域医师诊疗指南内科部分，以规范Ⅱ、Ⅲ期结直肠癌的内科治疗。

According to the data released by the National Cancer Center in 2019, the morbidity and mortality of colorectal cancer in China are on the rise. This mainly related to the lack of basic medical treatment standards, and the overall level of diagnosis and treatment is still low. Especially in county-level hospitals, due to the relatively backward allocation of various resources, it is impossible to completely follow the international treatment guidelines, and the medical level is uneven. Since county-level hospitals are the first unit of treatment for most patients with colorectal cancer, and the number of people who need services is large, it is especially important to develop guidelines for colorectal cancer diagnosis and treatment suitable for county-level hospitals. To this end, Professional Committee of Internal Medicine, Colorectal Cancer Committee of Chinese Medical Doctor Association drafted, discussed, and finally released Guidelines Internal Medicine Section for county physicians in diagnosis and treatment of stageⅡ and Ⅲ colorectal cancer in China, to standardize stage Ⅱ and Ⅲ colorectal cancer medical treatment.