PIK3CA and gastric neoplasm: In conclusion, we have identified two genes, cMET and PIK3CA, and 6 miRNAs, miR-223-3p, miR-19a-3p, miR-128-3p, miR-130b-3p, miR-34a-5p and miR-124-3p that were statistically differently expressed in gastric tumor tissues compared with normal mucosa.