Long-term outcome after hematopoietic stem cell transplantation of a single-center cohort of 90 patients with severe combined immunodeficiency

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Neven, Bénédicte | Leroy, Sandrine | Decaluwe, Hélène | Le Deist, Françoise | Picard, Capucine | Moshous, Despina | Mahlaoui, Nizar | Debré, Marianne | Casanova, Jean-Laurent | Dal Cortivo, Liliane | Madec, Yoann | Hacein-Bey-Abina, Salima | de Saint Basile, Geneviève | de Villartay, Jean-Pierre | Blanche, Stéphane | Cavazzana-Calvo, Marina | Fischer, Alain

Edité par CCSD ; American Society of Hematology -

International audience. Allogeneic hematopoietic stem cell transplantation (HSCT) is a curative treatment for severe combined immunodeficiency (SCID). Detailed assessment of the long-term outcome of HSCT, ie, the occurrence of clinical events and the quality and stability of immune reconstitution, is now required. We performed a single-center retrospective analysis of the long-term outcome of HSCT in 90-patient cohort followed for between 2 and 34 years (median, 14 years). Clinical events and immune reconstitution data were collected. Almost half the patients have experienced one or more significant clinical events, including persistent chronic graft-versus-host disease (GVHD), autoimmune and inflammatory manifestations, opportunistic and nonopportunistic infections, chronic human papilloma virus (HPV) infections, and a requirement for nutritional support. With the notable exception of severe HPV infection, these complications tend to become less common 15 years later after HSCT. A multivariate analysis showed that the occurrence of these events correlated with non-genoidentical donors, diagnosis of Artemis SCID, and quality of immune reconstitution. In most cases, HSCT enables long-term survival with infrequent sequelae. However, the occurrence of relatively late-onset complications is a concern that requires specific means of prevention and justifies careful patient follow-up.

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