PROX1 was recently shown to suppress MMP14 expression in breast cancer, as well as hepatocellular and colorectal carcinoma; here we showed that survival is worse specifically among those gastric cancer patients with a high MMP14 and a low PROX1 expression.21 To further explore the connection between MMP14 and PROX1 in gastric cancer, we proceeded by studying the expression levels in cell lines. Here, PROX1 is linked to breast cancer.