In some retrospective analyses, Ewing sarcoma patients with EWSR1-FLI1 showed better prognoses than patients with other translocations [19,20], but in a comparison of Ewing sarcoma patients’ survival in prospective trials, a significantly favorable survival of patients with EWSR1-FLI1 was not confirmed [21]. Here, EWSR1 is linked to Ewing sarcoma.