越来越多的事实证明，肿瘤的发生、演进是一系列基因的改变所致，这些基因的改变影响和破坏了细胞增生的正常调控机制。对于甲状腺癌分子发生机制的研究文献报道较少，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 More and more facts have proved that the occurrence and evolution of tumors are caused by a series of genetic changes that affect and destroy the normal regulatory mechanism of cell proliferation. There are few reports about the molecular mechanism of thyroid cancer. Recently, foreign studies have shown that ret cancer gene often appears in thyroid papillary carcinoma, a new activated form of PTCA gene and positive PTC oncogene