OUTLINE: Patients receive carboplatin IV over 30 to 60 minutes on days 1 and 22. Patients then receive paclitaxel IV over 3 hours on days 43 and 64, then topotecan IV over 30 minutes daily for 5 days beginning on days 85, 106, 127, and 148. Treatment continues in the absence of disease progression or unacceptable toxicity. Patients are followed monthly for 3 months and then every 3 months for 2 years.