OUTLINE: This is a dose escalation study. Patients receive adenovirus interferon gamma intratumorally on days 1, 8, and 15. Patients achieving tumoral response may receive additional courses of therapy at the discretion of the investigator. Cohorts of at least 3 patients receive escalating doses of adenovirus interferon gamma until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 3 of 6 patients experience dose limiting toxicity. Patients are followed for 3 weeks after treatment.