small cell sarcoma EWSR1-negative small round cell tumor https://www.malacards.org/card/ewsr1_negative_small_round_cell_tumor MONDO:0858921 UMLS:C5237359 MEDGEN:1714743 NCIT:C165671 A small cell sarcoma that is characterized by the absence of EWSR1 rearrangement and the presence of small round malignant cells with a small amount of cytoplasm. DOID:0081249