OUTLINE: This is an open label, multicenter study. Patients receive intravenous aminocamptothecin by continuous infusion over 120 hours on days 1-5 and 8-12 followed by 1 week of rest for a 3 week cycle. Therapy continues for a minimum of 6 weeks (2 full cycles) unless there are unacceptable toxic effects or rapid disease progression. Dose escalation may occur in patients who complete 3 cycles of therapy without unacceptable toxicity. All patients will be followed for survival.