NCIt definition : A fusion gene that results from a chromosomal translocation t(11;22)(q24;q12) which
fuses the first seven or ten exons of the EWSR1 gene with exon 5, 6 or 8 of the FLI1
gene. This rearrangement is associated with Ewing tumor/peripheral primitive neuroectodermal
tumor.;
NCIt note : The EWSR1/FLI1 fusion gene is found in 85% of cases of Ewing tumors. In the most common
fusion (type 1), exon 7 of the EWSR1 gene is fused in frame to exon 6 of the FLI1
gene; in type 2, EWSR1 exon 7 is fused in frame to FLI1 exon 5. (Atlas of Genetics
and Cytogenetics in Oncology and Haematology);