食管癌绝大多数为上皮来源,主要包括鳞癌和腺癌。晚期食管癌是指不能手术切除的局部晚期,以及有远处转移或复发的食管癌。这部分患者通常肿瘤负担较大,吞咽困难等症状较重,机体一般情况差,对化疗的耐受性降低。对可耐受的病人,化疗可以作为姑息性措施,减轻症状,改善病人生活质 The vast majority of esophageal epithelial origin, including squamous cell carcinoma and adenocarcinoma. Advanced esophageal cancer refers to locally advanced unresectable tumors and esophageal cancer with distant metastasis or recurrence. This part of the patients are usually more burdensome tumor, severe symptoms such as swallowing, the body is generally poor, reduced tolerance to chemotherapy. For tolerable patients, chemotherapy can be used as palliative measures to reduce symptoms and improve patient quality of life