FGFR2 was generally downregulated in most of the tumors, including COAD, kidney renal clear cell carcinoma (KIRC), LUAD, prostate adenocarcinoma (PRAD), and thyroid carcinoma (THCA) (Figures 1(a) and 1(c)). Here, FGFR2 is linked to prostate adenocarcinoma.