• Ann. Oncol. · Jan 2002

    Clinical Trial

    Phase I study of twelve-day prolonged infusion of high-dose ifosfamide and doxorubicin as first-line chemotherapy in adult patients with advanced soft tissue sarcomas.

    • T De Pas, G Curigliano, G Masci, C Catania, A Comandone, C Boni, A Tucci, O Pagani, E Marrocco, F de Braud, and Italian Sarcoma Group.
    • Division of Medical Oncology, European Institute of Oncology, Milan, Italy. tommaso.de-pas@ieo.it
    • Ann. Oncol. 2002 Jan 1; 13 (1): 161-6.

    PurposeTo determine whether a prolonged 12-day continuous infusion allows the administration of high-dose ifosfamide (IFO) with an acceptable toxicity profile when combined with full-dose doxorubicin (Adriamycin; ADM) as first-line chemotherapy in patients with advanced soft tissue sarcomas.Patients And MethodsEscalating doses of continuous infusion IFO (8-15 g/m2) given on days 1 to 12 in combination with ADM 75 mg/m2 given on day 8 and prophylactic granulocyte colony-stimulating factor support were administered every 4 weeks to 35 chemonaïve patients with advanced soft tissue sarcomas.ResultsThe maximum tolerated dose was IFO 15 g/m2. Hematological toxicity was the main dose-limiting toxicity and was dose dependent. Furthermore, thrombocytopenia was cumulative. Grade 4 (WHO) neutropenia and thrombocytopenia were recorded in 48% and 14% of courses, respectively. Eight patients experienced febrile neutropenia. A partial response was observed in 16 out of 30 assessable patients [53%, 95% confidence interval (CI) 25-63]; median time to progression was 25 weeks (range 4-91).ConclusionsThis study proved that a prolonged 12-day continuous infusion allows an increase in the total IFO dose that can be safely combined with ADM. A multicentric phase II study by the Italian Sarcoma Group to assess its antitumor activity is currently ongoing in patients with advanced soft tissue sarcomas.

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