Child with Wiskott–Aldrich syndrome underwent atypical immune reconstruction after umbilical cord blood transplantation: A case report

摘要

cqvip:BACKGROUND Timely reconstitution of a donor-derived immune system is important for recovery and long-term survival of patients after allogeneic hematopoietic stem cell transplantation(HSCT).We describe a case of Wiskott–Aldrich syndrome(WAS)treated by umbilical cord blood transplantation(UCBT)with atypical immune reconstruction.CASE SUMMARY A 1-year-old Chinese male infant was diagnosed with WAS.WAS gene sequencing identified the mutation c.777+1G>A(IVS8).On August 8,2017,he was admitted to our hospital for HSCT.We selected an unrelated Human leukocyte antigen 6/10-matched donor for UCBT.After HSCT,the immune reconstitution process was atypical,the lymphocytes reached 0.5×109/L on day 23,and the neutrophils reached 0.5×109/L on day 34.The patient’s recovery throughout the year was good.CONCLUSION An increase in lymphocytes(especially T cells)earlier than granulocytes may be a marker of a good prognosis in UCBT.