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许多研究证实,遗传因素在肿瘤发生中起着不可忽视的作用。如食管癌在河南林县、山西阳城都有明显的家族聚集性,提示林县、阳城的食管癌有遗传易感性。由于肿瘤细胞培养方法的改进和人类染色体显带技术的应
Many studies have confirmed that genetic factors play a non-negligible role in tumorigenesis. Such as esophageal cancer in Henan Linxian, Shanxi Yangcheng have significant familial aggregation, suggesting that Linxian, Yangcheng esophageal cancer genetic predisposition. Due to the improved methods of tumor cell culture and human chromosome banding technology should