PAS was shown to stain basement membranes25,27 and cytoplasm9,26 of gastric tumor cells lining the external wall of the VM channels without any involvement of CD31/CD34-positive vascular endothelial cells, like the golden standard for VM in solid tumors such as melanoma2, breast cancer8, and hepatocellular carcinoma7. Here, PECAM1 is linked to gastric neoplasm.