Study: NCT02805725

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Trabectedin
Description: Phase I trial based on a dose escalating study design (3+3 traditional design) assessing four dose levels of Trabectedin in combination with metronomic cyclophosphamide (CP).~A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.)

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Trabectedin
Description: Phase I trial based on a dose escalating study design (3+3 traditional design) assessing four dose levels of Trabectedin in combination with metronomic cyclophosphamide (CP).~A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.)

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 2: Trabectedin
Description: Patients will be included in a single-arm phase II trial. Administrated dose will be the RP2D defined in the dose escalation part of the trial. The design will follow a two-stage Simon's optimal design.~All patients will be treated at the RP2D of trabectedin defined in the preliminary phase I trial with the same schedule as in the phase I trial.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Cyclophosphamide
Description: A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.) Cyclophosphamide will be administered bi-daily (50 mg x 2), and given on a week on/week off schedule.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Cyclophosphamide
Description: A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.) Cyclophosphamide will be administered bi-daily (50 mg x 2), and given on a week on/week off schedule.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Cyclophosphamide
Description: A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.) Cyclophosphamide will be administered bi-daily (50 mg x 2), and given on a week on/week off schedule.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 1: Cyclophosphamide
Description: A treatment cycle consists of 4 weeks. Treatment may continue until disease progression or study discontinuation (withdrawal of consent, intercurrent illness, unacceptable adverse event or any other changes unacceptable for further treatment, etc.) Cyclophosphamide will be administered bi-daily (50 mg x 2), and given on a week on/week off schedule.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Phase 2: Cyclophosphamide
Description: All patients will be treated with metronomic cyclophosphamide with the same schedule as in the phase I trial.