PRIOR CONCURRENT THERAPY: Biologic therapy: At least 2 weeks since prior immunotherapy for AIDS-related KS and recovered At least 2 weeks since prior biologic therapy for AIDS-related KS No concurrent immunotherapy Chemotherapy: See Disease Characteristics At least 2 weeks since prior chemotherapy for AIDS-related KS and recovered No other concurrent systemic chemotherapy Endocrine therapy: At least 2 weeks since prior hormonal therapy for AIDS-related KS No concurrent hormonal therapy (including beta-HCG) Radiotherapy: See Disease Characteristics At least 2 weeks since prior radiotherapy and recovered No concurrent radiotherapy Surgery: At least 4 weeks since prior surgery No prior stereotactic surgery Other: Stable antiretroviral therapy for at least 4 weeks prior to and at least 29 days during the study Concurrent FDA approved antiretroviral agents or expanded access antiretroviral agents allowed At least 3 weeks since other prior investigational agents No concurrent local or topical therapy for AIDS-related KS No other concurrent investigational agents