OBJECTIVES: I. Determine the toxicity of intralesional immunotherapy with a recombinant vaccinia virus encoding the gene for sargramostim (GM-CSF) in patients with metastatic melanoma. II. Determine the efficiency of viral infection and GM-CSF gene insertion and function in these patients. III. Determine the capacity of this regimen to generate antiviral and antitumor immunity in these patients. IV. Determine the frequency of regression of injected and uninjected lesions in these patients.

OUTLINE: This is a dose-escalation study of intralesional recombinant vaccinia virus encoding the gene for sargramostim (GM-CSF) (rV-GM-CSF). Patients are stratified by center. Patients receive small pox (vaccinia) vaccine via multipuncture technique on day 0. On day 4, patients with a progressive major reaction to the initial vaccination receive rV-GM-CSF intralesionally twice weekly for 5 weeks. Only 1 lesion is treated and at least 1 measurable lesion is left untreated in each patient. Patients with responding disease after week 5 are retreated at a clinically appropriate dose and schedule. Cohorts of 5 patients receive escalating doses of intralesional rV-GM-CSF until the maximum tolerated dose (MTD) is determined. Additional patients receive rV-GM-CSF at the MTD.

PROJECTED ACCRUAL: Approximately 30 patients (15 for each phase) will be accrued for this study.

DISEASE CHARACTERISTICS: Histologically proven melanoma that is considered surgically incurable Dermal, subcutaneous, or lymph node metastases required At least 3 lesions evaluable and accessible for injection and biopsy One lesion at least 10 mm in diameter No leukemia or lymphoma

PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-1 Life expectancy: At least 6 months Hematopoietic: Not specified Hepatic: Bilirubin no greater than 3 times upper limit of normal (ULN) SGOT no greater than 3 times ULN Alkaline phosphatase no greater than 3 times ULN Renal: Creatinine no greater than 3 times ULN Immunologic: Clinical evidence of immune response required within 4 days of smallpox vaccination At least 1 positive cutaneous delayed-type hypersensitivity response to 1 of the following: Microbial recall antigens Dinitrofluorobenzene after sensitization Purified protein derivative of tuberculin following BCG vaccination No altered immunocompetence (e.g., immune deficiency disease or immunosuppressive therapy) in patient or household contacts No allergy to any of the following: Polymyxin B sulfate Streptomycin sulfate Chlortetracycline hydrochloride Neomycin sulfate No history of eczema or other exfoliative skin conditions in patient or household contacts HIV negative Other: No other malignancy within the past 3 years except superficial squamous cell or basal cell skin cancer or carcinoma in situ of the cervix or prostate Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception

PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: At least 8 weeks since prior chemotherapy No concurrent chemotherapy Endocrine therapy: No concurrent or imminent steroid therapy Radiotherapy: At least 8 weeks since prior radiotherapy No concurrent radiotherapy Surgery: See Disease Characteristics At least 4 weeks since prior surgery