RET and follicular variant thyroid gland papillary carcinoma: Microarray analyses of 24 thyroid carcinomas – 7 classic papillary, 8 follicular variants of papillary (fvPTC), 4 follicular (FTC) and 5 PDTC – were performed and correlated with RAS, BRAF, RET/PTC and PAX8-PPARG alterations.