Globally, the most common histological subtype was osteosarcoma (OS), all conventional high-grade OS, followed by Ewing sarcoma (EWS), all carrying EWS::FLI1 translocation (type 1 in 1 case, type 2 in 2 cases, and not determined in 2 cases), and other rare tumors. The gene discussed is EWSR1; the disease is osteosarcoma.