RT Journal Article T1 Response to Novel Drugs before and after Allogeneic Stem Cell Transplantation in Patients with Relapsed Multiple Myeloma. A1 López-Corral, Lucia A1 Caballero-Velázquez, Teresa A1 López-Godino, Oriana A1 Rosiñol, Laura A1 Pérez-Vicente, Sabina A1 Fernandez-Avilés, Francesc A1 Krsnik, Isabel A1 Morillo, Daniel A1 Heras, Inmaculada A1 Morgades, Mireia A1 Rifon, Jose J A1 Sampol, Antonia A1 Iniesta, Francisca A1 Ocio, Enrique-María A1 Martin, Jesús A1 Rovira, Montserrat A1 Cabero, Martín A1 Castilla-Llorente, Cristina A1 Ribera, Josep-María A1 Torres-Juan, Marta A1 Moraleda, Jose María A1 Martinez, Carmen A1 Vázquez, Alejandro A1 Gutierrez, Gonzalo A1 Caballero, Dolores A1 San Miguel, Jesús F A1 Mateos, María-Victoria A1 Pérez-Simón, Jose Antonio K1 Allo-HSCT K1 Allogeneic hematopoietic stem cell transplantation K1 Immunomodulatory drug K1 Multiple myeloma K1 Proteasome inhibitor AB Multiple myeloma (MM) remains as an incurable disease and, although allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potentially curative approach, most patients ultimately relapse, and their treatment remains challenging. Because allo-HSCT can modify not only the biology of the disease, but also the immune system and the microenvironment, it can potentially enhance the response to rescue therapies. Information on the efficacy and safety of novel drugs in patients relapsing after allo-HSCT is lacking, however. The objectives of this study were to evaluate the efficacy and toxicity of rescue therapies in patients with MM who relapsed after allo-HSCT, as well as to compare their efficacy before and after allo-HSCT. This retrospective multicenter study included 126 consecutive patients with MM who underwent allo-HSCT between 2000 and 2013 at 8 Spanish centers. All patients engrafted. The incidence of grade II-IV acute graft-versus-host disease (GVHD) was 47%, and nonrelapse mortality within the first 100 days post-transplantation was 13%. After a median follow-up of 92 months, overall survival (OS) was 51% at 2 years and 43% at 5 years. The median progression-free survival after allo-HSCT was 7 months, whereas the median OS after relapse was 33 months. Patients relapsing in the first 6 months after transplantation had a dismal prognosis compared with those who relapsed later (median OS, 11 months versus 120 months; P YR 2019 FD 2019-05-03 LK http://hdl.handle.net/10668/13914 UL http://hdl.handle.net/10668/13914 LA en DS RISalud RD Apr 14, 2025