They analyzed 45 of these new genes in both normal and cancerous tissues from the same patients and found that many of the genes were methylated specifically in the tumor samples.

• 同时研究者又分析了从同一病人获得的正常以及肿瘤组织45种新发现的基因，结果发现仅仅在肿瘤组织中这些基因发生了甲基化。