RARB and thyroid gland papillary carcinoma: Papillary thyroid cancer is also reported to involve methylation of other genes, including RARB (Retinoic Acid Receptor, Beta), p16INK4A (CDKN2A, Cyclin-Dependent Kinase Inhibitor 2A), TSHR (Thyroid Stimulating Hormone Receptor), CDH1 (Cadherin 1, type 1, E-cadherin), DAPK (Death-Associated Protein Kinase 1), and MLH1 (mutL Homolog 1) (Hoque et al., 2005; Guan et al., 2008; Mohammadi-asl et al., 2011).