FGFR1 and acute lymphoblastic leukemia: In particular, a fusion between the FGFR1 and HOOK3 genes was reported in the case of acute lymphoblastic leukemia [21], whereas FGFR1-TACC1 fusion is common in primary brain tumors such as extra-ventricular neurocytoma [22] and glioblastoma [23], and has been recently reported in a case of uterine spindle cell sarcoma [24].