It is consistent with our recent findings that CYP24A1 was significantly lowly methylated in PTC compared with normal tissues (Lihong Zhang, Jing Shi, Meiju Ji, Guanjun Zhang, Jiao Fu, Li Xu, Bingyin Shi, and Peng Hou: Methylation analysis of drug metabolism and transport genes in papillary thyroid cancer, submitted). This evidence concerns the gene CYP24A1 and thyroid gland papillary carcinoma.