Stromal cells (or cancer-associated cells) included endothelial cells (PECAM1/CD31+ and MMRN1+), fibroblasts (COL6A1+, COL1A1+, THY1+, and DCN+), epithelial cells (LAMC2+, KRT5+, and KRT14+), and unassigned name cells (high heat shock proteins expression), suggesting that they were cancerous cells. This evidence concerns the gene PECAM1 and cancer.