...如果在肿瘤发生的早期，还未侵袭到正常组织时，也就是癌前期（pre-cancer，包括非典型增生和原位癌）开始进行治疗，可以大大提高肿瘤的治愈率，将死亡风险降到最低。
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There are several districts with high incidence of this disease in China. Screening of precancer and early stage cancer of esophagus is an important approach for reducing the incidence rate and death rate.
食管癌在我国呈现地域性高发的分布特点，筛查和发现癌前病变病例对于降低食管癌发病率和死亡率具有重要意义。
参考来源 - 食管癌癌前血清分子标志物的研究及应用·2,447,543篇论文数据，部分数据来源于NoteExpress
It is considered that polarized light can be used for pre-cancer detection potentially.
因而认为偏振光在癌症早期检测技术中具有潜在应用意义。
Conclusion The oligofrutose can inhibit the formation of pre-cancer lesion of colon in rats.
结论低聚果糖能抑制大鼠结肠癌前期病变的形成。
Invasive molar pregnancy is extremely rare, but is one of te pre-cancer stage for choriocarcinoma .
侵袭性葡萄胎非常罕见，但却是绒癌的一种癌前病变。
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