PIK3CA and cancer: The above-mentioned five miRNAs were significantly enriched in numerous cancer-related pathways, including ‘MicroRNAs in cancer’, ‘Pathways in cancer’, ‘FoxO signaling pathway’, ‘Ras signaling pathway’, ‘Rap1 signaling pathway’, ‘MAPK signaling pathway’, and ‘PI3K-Akt signaling pathway’ [28].