NEW YORK-For some stage IV melanoma patients who achieve only a partial response or stable disease on a regimen of biochemotherapy, a maintenance strategy using interleukin-2 (IL-2) may prolong survival and in some instances produce durable complete responses, California researchers have discovered. Steven J. O’Day, MD, associate director, medical oncology, John Wayne Cancer Institute at St. John’s Health Center, Santa Monica, reported the encouraging results of a pilot study of the biotherapy maintenance strategy at the Chemotherapy Foundation Symposium XVIII.