To determine if C/EBPβ is expressed in Ewing sarcoma cells, we interrogated the Broad Institute's Cancer Cell Line Encyclopedia (CCLE) [30] for expression of CEBPB. Out of the 37 different cancer types evaluated, Ewing sarcoma had the highest CEBPB expression on average (Figure 1A). The gene discussed is CEBPB; the disease is cancer.