对十甲状腺癌的分子发生机制的研究较少最近国外研究表明，甲状腺乳头状癌中经常出现ｒｅｔ癌基因一种新的活化形式ＰＴＣ癌基因，ＰＴＣ癌基因表达阳性证明肿瘤中存在ｒｅｔ癌基因的活化［１］。目前国内尚未见有关文献报道，为此，我们采用逆转录－多聚酶链反应（ＲＴ－ＰＣ The research on molecular mechanism of dec thyroid cancer is less Recently, foreign studies have shown that there is often a new activated form of PTC oncogene of ret cancer gene in papillary thyroid carcinoma. The positive expression of PTC oncogene is evidence of the presence of ret oncogene Activation [1]. At present, no relevant literature has been reported in our country. To this end, we used reverse transcription-polymerase chain reaction (RT-PC