FLT1 and nasopharyngeal carcinoma: Moreover, the genes enriched in PI3K-Akt signaling pathway, such as EPHA2, IRS1, FN1, PDGFRB, THBS1, CCND1, CCNE1, TLR4, FGFR1 and FLT1, promote the development and progression of NPC (36–46).