RT Journal Article T1 Prospective phase II trial of extended treatment with rituximab in patients with B-cell post-transplant lymphoproliferative disease. A1 González-Barca, Eva A1 Domingo-Domenech, Eva A1 Capote, Francisco Javier A1 Gómez-Codina, Jose A1 Salar, Antonio A1 Bailen, Alicia A1 Ribera, Jose-María A1 López, Andres A1 Briones, Javier A1 Muñoz, Andres A1 Encuentra, Maite A1 de Sevilla, Alberto Fernández K1 Post-transplant lymphoproliferative disorders K1 Rituximab K1 Prognostic factors K1 Anticuerpos monoclonales K1 Estudios prospectivos K1 Trastornos linfoproliferativos K1 Trasplante de órganos K1 Resultado del tratamiento AB BACKGROUND AND OBJECTIVESThe elective treatment of patients with post-transplant lymphoproliferative disorders is controversial. The purpose of this trial was to evaluate the efficacy of treatment with extended doses of rituximab adapted to the response in patients with post-transplant lymphoproliferative disorders after solid organ transplantation.DESIGN AND METHODSThis was a prospective, multicenter, phase II trial. Patients were treated with reduction of immunosuppression and four weekly infusions of rituximab. Those patients who did not achieve complete remission (CR) received a second course of four rituximab infusions. The primary end-point of the study was the CR rate.RESULTSThirty-eight patients were assesable. One episode of grade 4 neutropenia was the only severe adverse event observed. After the first course of rituximab, 13 (34.2%) patients achieved CR, 8 patients did not respond, and 17 patients achieved partial remission. Among those 17 patients, 12 could be treated with a second course of rituximab, and 10 (83.3%) achieved CR, yielding an intention-to-treat CR rate of 60.5%. Eight patients excluded from the trial because of absence of CR were treated with rituximab combined with chemotherapy, and six (75%) achieved CR. Event-free survival was 42% and overall survival was 47% at 27.5 months. Fourteen patients died, ten of progression of their post-transplant lymphoproliferative disorder.INTERPRETATION AND CONCLUSIONSThese results confirm that extended treatment with rituximab can obtain a high rate of CR in patients with post-transplant lymphoproliferative disorders after solid organ transplantation without increasing toxicity, and should be recommended as initial therapy for these patients. PB Ferrata Storti Foundation SN 0390-6078 YR 2007 FD 2007-11 LK http://hdl.handle.net/10668/1293 UL http://hdl.handle.net/10668/1293 LA en NO González-Barca E, Domingo-Domenech E, Capote FJ, Gómez-Codina J, Salar A, Bailen A, et al. Prospective phase II trial of extended treatment with rituximab in patients with B-cell post-transplant lymphoproliferative disease. Haematologica. 2007; 92(11):1489-94 NO Clinical Trial, Phase II; Journal Article; Multicenter Study; DS RISalud RD Apr 11, 2025