EWSR1-Negative Small Round Cell Tumor

**Semantic type:** Neoplastic Process

**Definition:** A high-grade sarcoma characterized by the absence of EWSR1 rearrangement and the presence of small round malignant cells with a small amount of cytoplasm.

**Synonyms:** - EWSR1-Negative Small Blue Round Cell Tumor - EWSR1-Negative Small Cell Sarcoma