Metastatic Ewing Sarcoma/Peripheral Primitive Neuroectodermal Tumor

**Semantic type:** Neoplastic Process

**Definition:** A small round cell tumor with or without neural differentiation that has spread from its original site of growth to another anatomic site.

**Synonyms:** - Metastatic Ewing's Sarcoma/Peripheral Primitive Neuroectodermal Tumor