Activating mutations in FGFR1 were found in glioblastoma [95,96], FGFR2 is often mutated in endometrial carcinomas and lung cancers [97,98], FGFR3 mutations are frequently found in bladder tumors and melanoma [99,100], whereas FGFR4 is mutated in endometrial and lung cancers [101,102]. Here, FGFR4 is linked to melanoma.