TCF7L2 and liver dysplastic nodule: This was consistent with conclusions from Lewis et al. [23], Hussain et al. [12] and Sale et al. [24], But Fu et al. [25] concluded inconsistent results on relationship between TCF7L2 rs7903146 polymorphism and DN risk, in this study, just 248 DN patients were included in the analysis, so the limited sample size maybe the reason for inconsistent results between this study and our study.