Overview Safety and Efficacy Study to Treat Recurrent Grade 4 Malignant Brain Tumors Status: Completed Trial end date: 2007-06-01 Target enrollment: Participant gender: Summary Immunotoxin therapy may be effective in treating malignant glioma. Immunotoxins can locate tumor cells and kill them without harming normal cells. Phase: Phase 2 Details Lead Sponsor: Teva Branded Pharmaceutical Products R&D, Inc.Teva Pharmaceutical Industries