EWSR1 and neoplasm: This dataset was then used to select those markers that, apart from CD45 and CD56, would most contribute to sub-classification of non-hematopoietic tumor cells into the most common diagnostic categories of non-hematopoietic small round cell tumors (SRCT) (e.g., NBL, RMS, EWS, and WT) (Table 2 and Table S1).