The ASCAT analysis detected 19 copy gains of FGFRs in 15 unique CCA tumors: FGFR1 (4/175), FGFR2 (2/175), FGFR3 (6/175), and FGFR4 (7/175; Data Supplement). Here, FGFR3 is linked to cholangiocarcinoma.