The U.S. Food and Drug Administration has granted full approval to Eisai Corporation’s ONTAK(R) (denileukin diftitox) solution to be used in the form of an intravenous injection for treating patients suffering from recurrent cutaneous T-cell lymphoma (CTCL) . The supplemental biologics license application is based on findings of a Phase III clinical trial that measured the efficacy of ONTAK in patients with this rare form of malignant lymphoma.