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浅谈食管癌研究中的质量互变大连市友谊医院胸心血管外科（１１６００１）董志扬范明慧王文钊邓世平食管粘膜上皮癌变的发生与发展和一切事物一样，是一个不断地由量变到质变、质量互变的过程，具体表现在以下三方面。１致癌作用的阶段性：致癌作用的两阶段学说认为，第...
A brief discussion on the interconversion of quality in esophageal cancer research Dalian Friendship Hospital, Department of Thoracic and Cardiovascular Surgery (116001) Dong Zhiyang Fan Minghui Wang Wendi Deng Shiping The occurrence and development of esophageal epithelial carcinogenesis is the same as everything else. It is an ongoing change from quantitative to qualitative and qualitative. The process of change is specifically reflected in the following three aspects. 1 stage of carcinogenesis: the two-stage theory of carcinogenesis believes that the first...