- Arm II: Patients receive cisplatin IV over 30 minutes followed by vinblastine IV on days 1-4. Patients also receive dacarbazine IV over 1 hour on day 1, interleukin-2 IV over 96 hours on days 1-4, and interferon alfa SC on days 1-5, 8, 10, and 12. In addition, patients receive filgrastim (G-CSF) SC on days 6-15. Treatment repeats every 3 weeks for 3 courses in the absence of disease progression or unacceptable toxicity.