EpCAM, IL8, CXCL10/IP10, CCL3/MIP-1α, CCL4/MIP-1β, CCL15/MIP-1δ, PDGFR-B protein were found to be expressed predominantly in tumours only, suggesting that they could be involved in the later stages of gastric tumorigenesis. This evidence concerns the gene PDGFRB and neoplasm.