Non-progression, defined as complete response, partial response, or stable disease (osteosarcoma) At 6 months [clinicaltrials_resource:2d49d40f51adcb3bd99aac16f7a797a5]

The best overall response is the best response recorded from the start of the treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started). Will be analyzed independently for each stratum (osteosarcoma and Ewing sarcoma). Will be described using frequency, percentage, and 95% confidence interval (binomial law).

Non-progression, defined as complete response, partial response, or stable disease (osteosarcoma) At 6 months [clinicaltrials_resource:2d49d40f51adcb3bd99aac16f7a797a5]

The best overall response is the best response recorded from the start of the treatment until disease progression/recurrence (taking as reference for progressive disease the smallest measurements recorded since the treatment started). Will be analyzed independently for each stratum (osteosarcoma and Ewing sarcoma). Will be described using frequency, percentage, and 95% confidence interval (binomial law).