The results showed that the expression levels of NADH dehydrogenase, ATP synthetase 6, cytochrome oxidase B, and cytochrome oxidase I and III genes are upregulated in papillary thyroid carcinoma, whereas the expression of nuclear encoded mtTFA is not significantly changed (Haugen et al., 2003). This evidence concerns the gene TFAM and thyroid gland papillary carcinoma.