- Patients must have received =< 1 prior chemotherapy and/or =< biological therapies; isolated limb perfusion with a biological and/or chemotherapeutic agent is allowed if the measurable disease and the lesion that will be biopsied for this protocol are outside the area of prior perfusion; at least 4 weeks must have elapsed since prior therapy (6 weeks for nitrosoureas or mitomycin C) and the patient must have recovered from all toxicities attributable to prior therapy