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Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Distinctive Infectious Complications in Patients with Central Nervous System Lymphoma Undergoing Thiotepa, Busulfan, and Cyclophosphamide-conditioned Autologous Stem Cell Transplantation.
Biology of Blood and Marrow Transplantation 2018 September
We investigated the incidence of viral, fungal, bacterial, and parasitic infections observed in 57 patients with central nervous system lymphoma after thiotepa, busulfan, and cyclophosphamide-conditioned autologous stem cell transplantation (TBC-ASCT) and 79 patients with systemic non-Hodgkin lymphoma after traditional carmustine, etoposide, cytarabine, and melphalan-conditioned ASCT (BEAM-ASCT). Twenty of 57 (35%) TBC-ASCT patients had detectable viremia with human herpesvirus 6, cytomegalovirus, adenovirus, or BK virus, versus 9 of 79 (11%) BEAM-ASCT patients. Eight TBC-ASCT patients had clinically relevant viral infections (4 human herpesvirus 6, 2 cytomegalovirus, 1 adenovirus, 2 BK virus), versus 0 in the BEAM-ASCT group. Four TBC-ASCT patients suffered infections from either a fungal or parasitic pathogen versus 1 BEAM-ASCT patient. TBC was associated with greater risk of viral reactivation compared with BEAM, independent of other factors (hazard ratio, 4.42; 95% confidence interval, 1.9 to 11.3; P < .001). Prolonged lymphopenia and steroid use in the peri- and post-ASCT period did not explain these observed differences. The pathogenesis of these unusual infections in TBC-ASCT patients remains incompletely understood, and may involve more potent immune suppression with TBC conditioning. Clinicians should be aware of these differences in infection risk in TBC-ASCT patients, which more closely parallel those seen in allogenic hematopoietic cell transplantation recipients. New prophylactic approaches to help minimize these infections should be considered in this population.
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