OUTLINE: This is a dose escalation study of ganciclovir. Patients are stratified according to response of the index lesion and other metastatic disease sites. Patients receive an intratumoral injection of adenovirus RSV-TK on day 1. Ganciclovir IV is administered every 12 hours on days 3-10 for a total of 14 doses. Patients sustaining a partial response (PR) or complete response (CR) may be retreated 2 weeks after documented PR or CR. Cohorts of 3-6 patients receive escalating doses of ganciclovir until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 6 patients experience dose limiting toxicities. Patients are followed at 3 weeks, 4 weeks, 60 days, then every 2 months for 6 months, and then every 3 months for 1.5 years.