The full name of the EWSR1 gene is Ewing sarcoma breakpoint region 1 gene. First discovered in Ewing’s sarcoma, located at 22q12, consisting of 17 exons, encoding a nuclear protein of 656 amino acids. It is an RNA binding protein. It plays an important role in mitotic cell separation, spindle formation, microtubule stability, DNA repair and cell senescence. It belongs to the cytokine TET family members, which controls cell growth.