FGFR2 and gastric cancer: Additionally, the ROC analysis revealed that the FGFRs expression levels had high diagnostic potential for GC, among which FGFR4 was the most accurate (FGFR1: AUC: 0.615, FGFR2: AUC: 0.533, FGFR3: AUC: 0.615, FGFR4: AUC: 0.878; Figure 2F).