EBMT

Allogeneic hematopoietic stem cell transplantation is among the most effective methods for treating malignant hematopoietic tumors. However, for extramedullary leukemia, even with high-intensity chemotherapy and transplantation, the recurrence rate remains high. To improve the prognosis, it's essential to optimize the pre-treatment plan and reduce recurrence.At this EBMT annual meeting,Dr. Min Xiong from Hebei Yanda Ludaopei Hospital reported a clinical study (Abstract No.: 1100). Results indicate that a pre-treatment regimen incorporating cytarabine for haploidentical hematopoietic stem cell transplantation to treat extramedullary leukemia is both safe and effective. We've invited Dr. Xiong  for a  interpretation of this research. This retrospective analysis was conducted on 36 patients with extramedullary leukemia who underwent haploidentical allogeneic hematopoietic stem cell transplantation at Beijing Ludaopei Hospital from August 2019 to March 2022. The pre-treatment regimen used BU/CY in 14 cases (38.9%) and TBI/CY in 22 cases (61.1%), combined with cytarabine (5 mg/kg, on days -3 and -2). The overall survival (OS), disease-free survival (DFS), and transplant-related mortality (TRM) of the patients were assessed.

Acute T-cell lymphoblastic leukemia (T-ALL) is a highly heterogeneous malignant tumor of the hematopoietic system caused by the malignant transformation of T-cell precursors. It has significant differences from B-cell precursor acute lymphoblastic leukemia (BCP-ALL) in clinical features, cellular genetics, molecular biology, and abnormal signal transduction pathways. T-ALL accounts for 10%-15% in children and 20%-25% in adults. Adult T-ALL has a poor prognosis due to primary chemotherapy resistance and early recurrence, with a 5-year event-free survival rate of only 20%-50%. The main challenge for T-ALL patients after transplantation is recurrence. From April 23-26, 2023, the EBMT Annual Meeting was grandly held in Paris, France. At the meeting, Dr. Cao Xingyu from Hebei Yanda Ludao Pei Hospital reported a clinical study (abstract number: 351), which suggested that the use of Chidamide for maintenance treatment might improve the survival of T-ALL patients after allogeneic hematopoietic stem cell transplantation (Allo-HSCT).