Patients Characteristics Age in Years 13.5 (4-18) Sex Female 13 Male 20 Histological response to chemotherapy   GR 16   Grade IV 4   Grade III 12   PR 17 Metastatic Status 2 with lungs metastases survival 21 alive 12 dead (2 metastatic diseases) OS Median in months 85 At 5 Years 72% At 10 Years 64% EFS Median in months 79 At 5 Years 61% At 10 Years 54%

Table 1: patient’s clinical characteristics.