CCNB3 and Ewing sarcoma: Although Ewing-like sarcomas are more aggressive than Ewing sarcoma,[4] patients display longer survival with BCOR-CCNB3 Ewing-like sarcomas in the extremities.[17] Although lacking established variants of clinical significance, immunostaining revealed BCOR positive tumor cells, suggesting that this could be a case of BCOR sarcoma.