- Patients with doxorubicin- and ifosfamide-resistant synovial sarcoma (defined as patients with progression under doxorubicin and ifosfamide treatments or with rapid progression (i.e. within 4 months) after the last dose of doxorubicin and ifosfamide, or patients previously treated with doxorubicin and ifosfamide and with disease progression on another regimen of chemotherapy for advanced disease).