ACTB was the best reference gene in women with PTC (Fig. 5-1A\B) and FTA (Fig. 5-1I\J) subtypes, while B2M was the best in FTC-women (Fig. 5-1C\D), PYCR1 was the best in PDTC-women (Fig. 5-1E\F), and TBP was the best in ATC-women (Fig. 5-1G\H). The gene discussed is B2M; the disease is thyroid cancer, nonmedullary, 2.