Survival according to age, tumor characteristics, and time to diagnosis (TtD).

*Degree of significance of the Logrank test.‡Cox model with adjustment for the following covariables: TtD less than or more than the median of 65 days, age older or younger than 5 years, desmoplastic or not histology, metastatic or localized tumor.§One patient died within 24 h of surgery, before spinal MRI, and was thus excluded from the analysis.