OUTLINE: This is a multicenter study. Patients receive 6-hydroxymethylacylfulvene IV over 5 minutes on days 1-5. Treatment repeats every 4 weeks for a minimum of 2 courses in the absence of disease progression or unacceptable toxicity. Patients with stable or responding disease after completion of course 2 receive additional courses. Patients are followed every 3 months for 5 years, and then annually thereafter until death.