食管癌是一种预后很差的恶性肿瘤。统计表明,在过去的15～20年中,其长期存活率并无明显的改善,5年存活率只有5～11%。食管癌在中国、南非、伊朗以及苏联南部是呈地方性的。在美国和欧洲也有高发病区。局部区域性肿瘤(临床表现,肿瘤只局限于食管及周围的组织)的常规治疗是施用手术或放射疗 Esophageal cancer is a malignant tumor with a very poor prognosis. Statistics show that in the past 15 to 20 years, there has been no significant improvement in long-term survival. The 5-year survival rate is only 5 to 11%. Esophageal cancer is endemic in China, South Africa, Iran, and the southern Soviet Union. There are also high incidence areas in the United States and Europe. Regional treatment of local tumors (clinical manifestations, tumors confined to the esophagus and surrounding tissue) is usually treated with surgery or radiation therapy