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食管癌的二级 (发病学 )预防———化学预防癌的化学预防是用药物预防癌瘤的发生 ,是 2 0世纪 80年代新兴的研究领域 ,实践证明这是近期能够降低癌发生率和死亡率的唯一可行手段。我们不提倡全民的化学预防 ,因为没有必要 ,也不可能。我们提倡癌高风险人群的化学预防。食管癌的
Secondary Prevention of Esophageal Cancer - Chemopreventive Chemoprevention Cancer prevention is the use of drugs to prevent cancer and is a newly emerging area of research in the 1980s. Practice has proved that this is a way to reduce the incidence of cancer and The only viable means of mortality. We do not advocate universal chemical prevention because it is not necessary or impossible. We advocate chemical prevention in people at high risk of cancer. Esophageal cancer