PIK3CA and cancer: The results indicated that the module nodes were significantly enriched in cell cycle, microRNAs in cancer, PI3K-Akt signaling pathway, pathways in cancer, FoxO signaling pathway, apoptosis, central carbon metabolism in cancer, p53 signaling pathway, pancreatic cancer, sphingolipid signaling pathway, AMPK signaling pathway, mTOR signaling pathway, proteoglycans in cancer and focal adhesion.