NAMPT expression in thyroid cancers was positively correlated with tumor stage (P = 0.0012; r = 0.493), and it was significantly higher in tumors staged pT3 or pT4 (16 cases) than in tumors staged pT1 or pT2 (24 cases) (P = 0.0106; Fig. 2). Here, NAMPT is linked to thyroid cancer.