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The purpose of this study is to determine whether it is feasible to administer high-dose epirubicin (135 mg m(-2)) combined with a fixed dose of cisplatin every 2 weeks with G-CSF support in patients with metastatic non-small-cell lung cancer (NSCLC). Subsequently, the efficacy of the recommended dose of this regimen was tested in a phase II study in patients with relapsed NSCLC. In the initial feasibility study at least 6 patients were entered at each of the 4 dose levels tested. A fixed dose of cisplatin 60 mg m(-2) was given. Epirubicin was administered at 120 mg m(-2) on dose level 1, 135 mg m(-2) on dose level 2 and 3 and 135 mg m(-2) on dose level 4. Patients treated at dose level 3 and 4 received G-CSF support on days 3-12. Cycles were repeated every 3 weeks on the first 3 dose levels and every 2 weeks on the fourth dose level. A total of 27 patients were then treated on dose level 4, which appeared to be feasible in the initial study. In the initial study, a total of 86 courses were administered. Haematological toxicity was the principal side effect. None of the patients encountered dose-limiting toxicity in the first course, which confirmed that epirubicin 135 mg m(-2) could be combined with cisplatin 60 mg m(-2) and accelerated by G-CSF support to a 14-day-schedule. In the subsequent phase II study with this schedule, 89 courses were administered. The relative dose intensity of cisplatin and epirubicin was 0.90 and 0.91, respectively. Myelosuppression was frequent with 70% and 63% of patients experiencing WHO grade III or IV leukocytopenia and thrombocytopenia, respectively. 6 cases of febrile neutropenia were observed, with 2 treatment-related deaths. Non-haematological toxicity consisted mainly of nausea and vomiting, which was grade III in 22% of patients. Renal toxicity grade I and II occurred in 37% and 4% of patients, respectively. 55% of these patients had received prior cisplatin-containing chemotherapy. On an intention-to-treat basis 9 partial responses were recorded in 27 patients (33%; 95% confidence interval, 15%-51%). Accelerated cisplatin and high-dose epirubicin with G-CSF support is a feasible and promising regimen in relapsed NSCLC. Myelosuppression limits the use of this regimen in the second-line setting to a selected group of patients with a good performance status. Since the activity of this regimen is encouraging, it is probably best studied in untreated patients.

Accelerated cisplatin and high-dose epirubicin with G-CSF support in patients with relapsed non-small-cell lung cancer: feasibility and efficacy