FGFR2 and cholangiocarcinoma: Several other partners involved in FGFR2 fusion genes, whose biological activity has not been fully characterized, have been described in cholangiocarcinoma, including KIAA1217, KIAA1598, DDX21, LAMC1, NRAP, NOL4, PHC1, RABGAP1L, RASAL2, ROCK1, TFEC, AFF4, CELF2, DCTN2, DNAJC12, DZIP1, FOXP1, INA, KCTD1,LGSN, LPXN, MYPN, PRKN, PCM1, RNF41, SH3GLB1, STK3, SORBS1, TBC1D1, and UBQLN1 [33,34,35].