OUTLINE: This is a multicenter study. Patients are stratified according to center, tumor infiltrating lymphocyte (TIL) dose (low vs high), and medical condition suitable for interferon alfa (IFN-A)/interleukin-2 (IL-2) (yes vs no). Patients are assigned to one of two treatment regimens based on entry criteria. Regimen A (preferred): Patients meeting the preferred entry criteria receive IFN-A subcutaneously on days 1-4, TIL expanded in vitro with IL-2 IV on day 5, and IL-2 IV continuously over 72 hours following TIL infusion. Regimen B: All other patients receive TIL infusion once followed by oral cimetidine every 6 hours for 4 weeks. Treatment repeats in both regimens every 3-6 weeks in the absence of disease progression and according to TIL availability. Patients are followed every 6 months.