When blood counts recover, patients receive high dose interleukin-2 SQ on days 1-10 followed by low dose interleukin-2 SQ on days 11-13. Interleukin-2 treatment repeats every 14 days for 6 courses in the absence of disease progression or unacceptable toxicity. Patients with immunologic response to 6 courses of interleukin-2 treatment may continue for 6 additional courses.