3.1 Patient Characteristics
Twelve patients enrolled: seven with Ewing sarcoma and five with osteosarcoma (Table 1) . Most patients were male (75%, n=9) and the median age at study entry was 15.0 years (range 12.9-33.2). Patients enrolled on trial a median 14.4 months (range 8.0–76.5) from initial diagnosis. The number of prior systemic therapy regimens varied from 1 to 10, with a median of 1.5 prior regimens.