Originally published as JCO Early Release 10.1200/JCO.2005.05.117 on November 8 2004

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Phase I Trial of Iodine-131 Tositumomab With High-Dose Chemotherapy and Autologous Stem-Cell Transplantation for Relapsed Non-Hodgkin's Lymphoma

From the Department of Internal Medicine, Section of Hematology/Oncology, Department of Radiation Oncology, Department of Radiology, Section of Nuclear Medicine, and Department of Preventive and Societal Medicine, University of Nebraska Medical Center, Omaha, NE

Address reprint requests to Julie M. Vose, MD, Section of Hematology/Oncology, 987680 Nebraska Medical Center, University of Nebraska Medical Center, Omaha, NE 68198-7680; e-mail: jmvose{at}unmc.edu

PURPOSE: To determine the maximum outpatient dose of iodine-131 tositumomab (up to 0.75 Gy) combined with high-dose carmustine, etoposide, cytarabine, and melphalan (BEAM) followed by autologous stem-cell transplantation (ASCT) for the treatment of chemotherapy-resistant relapsed or refractory B-cell non-Hodgkin's lymphoma (NHL).

PATIENTS AND METHODS: Twenty-three patients with chemotherapy-refractory or multiply-relapsed B-cell NHL were treated in a phase I trial combining iodine-131 tositumomab (ranging from 0.30 to 0.75 Gy total-body dose [TBD]) with high-dose BEAM followed by ASCT.

RESULTS: The complete response rate after transplantation was 57%, and the overall response rate was 65%. Short-term and long-term toxicities were similar to historical control patients treated with BEAM alone. With a median follow-up of 38 months (range, 27 to 60 months), the overall survival (OS) rate was 55%, and the event-free survival (EFS) rate was 39%.

CONCLUSION: There were no significant added toxicities apparent with the addition of iodine-131 tositumomab up to a dose of 0.75 Gy TBD to high-dose BEAM chemotherapy followed by ASCT. The EFS and OS were encouraging in this group of chemotherapy-resistant or refractory B-cell NHL patients. A follow-up phase II trial with iodine-131 tositumomab at the dose of 0.75 Gy TBD with BEAM is currently ongoing.

Authors' disclosures of potential conflicts of interest are found at the end of this article.

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