Microarray-based DNA methylation study in Ewing sarcoma of bone H.-R. Park * , Y.-K. Park * Hallym University, Sacred Heart Hospital, Anyang, Republic of Korea Objective: Alterations in the DNA methylation pattern are a hallmark of malignancy and also of Ewing sarcomas. However, most epigenetic studies in Ewing sarcoma have focused on the analysis of few candidate genes and comprehensive studies are required. Method: Here, we report for the first time a microarraybased DNA methylation study of 1505 CpG sites of cancerrelated 807 genes in 69 Ewing sarcomas. We used Illumina's GoldenGate Methylation Cancer Panel I microarray.