Addition of Ipilimumab (MDX-010) To Isolated Limb Infusion (ILI) With Standard Melphalan and Dactinomycin In The Treatment of Advanced Unresectable Melanoma of The Extremity

Isolated limb infusion ((ILI) with Melphalan and Dactinomycin- MSKCC operating room. Ipilimumab- IV administration in outpatient chemotherapy clinic. Induction therapy with Ipilimumab will start 1-3 weeks after ILI in the standard dose of 10mg/kg every 3 weeks for a total of 4 doses. Patients will then receive chronic therapy every 3 months. Patients will be followed every 3 months for 2 years.