FGFR2 and gastric cancer: FGF18, a ligand for FGFR2, interacts with FGFR2, enhances F‐actin, and then promotes nuclear aggregation of YAP1; FGFR2 also activates the MAPK pathway and its downstream molecule, c‐Jun, which upregulates YAP1 transcription to promote the progression of gastric cancer.216