Positive NDRG4 staining was an independent predictor of favorable survival in a cohort including 272 Chinese colorectal cancer (CRC) patients [33]; however, we could not find the support evidence from 174 CRC patients in TCGA4U [57], a web-based platform using TCGA datasets (P > 0.05, data not shown). This evidence concerns the gene NDRG4 and colorectal cancer.