We regret that an error was made in "SOX4 contributions to TGF-b-induced endothelial-mesenchymal transition and stem cell characteristics of gastric cancer cells" (Genes & Diseases (2018) 5, 49-61). In this manuscript, the expression of SOX4 of cancer and adjacent tissues in 84 patients were detected, and 8 pairs of typical pictures were listed in Figure 1A. We note that we made an unintentional error. We confused some pictures (non-cancer tissues of NO.2 and 3) of Figure 1A due to the large number of IHC samples and pictures. We are very sorry for the trouble we caused due to our cursoriness. Here, the corrected Figure 1A are attached below. The authors confirm that this correction does not alter our conclusions in any means. Nonetheless, we apologize for the error and for any inconvenience that may cause to the readers, the reviewers, and the editors.