OUTLINE: Patients receive topotecan IV over 30 minutes on days 1-4 and paclitaxel IV over 1 hour followed by carboplatin IV over 1 hour prior to topotecan on day 4. Patients receive filgrastim (G-CSF) subcutaneously once daily beginning on day 5 and continuing until blood counts recover. G-CSF must be discontinued at least 24 hours prior to beginning each subsequent course of chemotherapy. Treatment repeats every 3 weeks for 6 courses in the absence of disease progression or unacceptable toxicity. Patients are followed every 6 months for 3 years.