我国食管癌的死亡率居世界首位,虽然近年来食管癌的死亡率有所下降,但降低并不明显,在一些食管癌的高发区,其发病率和死亡率仍然维持在较高水平。食管癌的发病在全世界和我国均有较明显的地区差异。除此以外,我国食管癌发生的组织学也与西方国家存在明显差别,我国食管恶性肿瘤9 The death rate of esophageal cancer in China ranks first in the world. Although the death rate of esophageal cancer has declined in recent years, the decrease is not obvious. In some areas with high incidence of esophageal cancer, the morbidity and mortality of esophageal cancer remain at a relatively high level. The incidence of esophageal cancer in the world and our country have more obvious regional differences. In addition, the histology of esophageal cancer in China is also significantly different from Western countries, our country esophageal cancer 9