These two isolates limb perfusions with melphalan are treated 3-6 weeks apart. After perfusion is established, the leak rate has been determined to be acceptable, and tissue temperatures are 38 degrees Celsius, then the melphalan is administered by slow injection into an arterial line over approximately 5 minutes. The perfusion with melphalan will then continue for 60 minutes, after which the extremity is flushed out with a total of 3 liters of fluid consisting initially of a saline solution. The dose of melphalan for the second perfusion will be increased.