According to the RNA-seq data from TCGA-STAD, the mRNA expression levels of COL6A3, COL1A1, COL1A2, PDGFRB, THBS2, COL4A1, COL4A2, VEGFC, FN1, LAMB1, and EFNA4 were significantly higher in cancer tissues compared to normal tissues (Figure S1). This evidence concerns the gene EFNA4 and cancer.