KDM3A and Ewing sarcoma: Considering the limited sample size of normal tissues (n = 2) in TCGA, we further analyzed a GSE73166 dataset from the Gene Expression Omnibus (GEO) database (https://www.ncbi.nlm.nih.gov/geo/), which suggested that the KDM3A expression was even higher in OS tissue samples than that in Ewing Sarcoma (Fig. 1B).