FGFR1 and breast cancer: As for breast cancer, FGFR1–3 gene fusions have been observed to occur with multiple partners (i.e., TACC1, TACC2, TACC3, BAIAP2L1, BICC1, NPM1, PPAPDC1A, AFF3, SLC45A3 and AHCYL1) [54,70,81].