All patients receive subcutaneous interferon alfa on day 1 and interleukin-2 on days 3-5 of week 1, followed by reduced doses of interferon alfa and interleukin-2 on days 1, 3, and 5 of weeks 2-6. Patients are assessed for response approximately 2 months after initiating therapy. Patients with stable or responding disease undergo a second course; those who continue to respond may receive additional therapy provided toxicity is limited.