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结肠癌和直肠癌的治疗方法主要是进行根治性外科手术切除或放射治疗结合手术的综合治疗，晚期不能手术病例可用氟尿嘧啶（5-Fluorouracil，5-Fu）为主的联合化疗。胃肠道肿瘤对化疗的敏感性较为有限。但值得注意的是这类肿瘤都能释放癌胚抗原（Carcinoem-bryonic antigen），其免疫治疗尚在试验阶段，但可用放射免疫检定法（RIA）检查外科手术后的复发问题，也可以检测化疗的效果。胃肠道肿瘤中最常见的是结肠直肠癌，外科手术的痊愈率约43％。转移性晚期患者最有效的药物是氟尿嘧啶，据2000例临床报道，此药总有效率为21％，但未能完全缓解。氟尿嘧啶衍生物——氟尿嘧啶脱氧核苷（Floxuri-
The treatment of colorectal cancer and rectal cancer is mainly a combination of radical surgical resection or radiation therapy combined with surgery. Late-stage inoperable cases can be treated with 5-Fluorouracil (5-Fu) combined chemotherapy. The sensitivity of gastrointestinal cancers to chemotherapy is limited. However, it is worth noting that this kind of tumor can release Carcinoem-bryonic antigen, and its immunotherapy is still in the experimental stage, but radioimmunoassay (RIA) can be used to check the recurrence after surgery, and it can also detect chemotherapy. Effect. The most common gastrointestinal cancer is colorectal cancer, and the surgical recovery rate is about 43%. The most effective drug for patients with advanced metastatic disease is fluorouracil. According to 2000 clinical reports, the total effective rate of this drug is 21%, but it has not been completely relieved. Fluorouracil Derivatives - Fluorouracil Deoxynucleosides (Floxuri-