Overview Phase II Clinical Study of Imatinib Mesylate in Patients With Malignant Gastrointestinal Stromal Tumors (Extension Study) Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary This is a extension study of CSTI571B1201 study Phase: Phase 2 Details Lead Sponsor: Novartis PharmaceuticalsTreatments: Imatinib Mesylate