OUTLINE: Patients are assigned to one of three treatment regimens. Regimen I: Patients receive carboplatin IV over 30 minutes on day 1 followed by topotecan IV over 30 minutes on days 1-3. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Patients then receive paclitaxel IV over 3 hours followed by carboplatin IV over 30 minutes on day 1. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Regimen II: Patients receive topotecan IV over 30 minutes on days 1-3 followed by carboplatin IV over 30 minutes on day 3. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Patients then receive paclitaxel IV over 3 hours followed by carboplatin IV over 30 minutes on day 1. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Regimen III: Patients receive topotecan IV over 30 minutes on days 1-5 followed by carboplatin IV over 30 minutes on day 5. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Patients then receive paclitaxel IV over 3 hours followed by carboplatin IV over 30 minutes on day 1. Treatment continues every 21 days for 4 courses in the absence of disease progression or unacceptable toxicity. Patients are followed at 1 month and then every 3 months for 1 year.