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Table 1. Characteristics of Children With Extraosseous Ewing Sarcoma and Skeletal Ewing Sarcoma

Characteristic Extraosseous Ewing Sarcoma Skeletal Ewing Sarcoma P Value 
Mean age (range), years20 (0–39)16 (0–39)<.001
Male gender53%63%<.001
White (nonwhite race)85% (15%)93% (8%)<.001
Axial primary sites (non-axial primary)73% (27%)54% (46%)<.001
Pelvic primary sites (nonpelvic primary)20% (80%)27% (73%).001