Association between body mass index and survival after hematopoietic stem cell transplantation.

Background/aims: The unclear relationship between body mass index (BMI) and post-hematopoietic stem cell transplantation (HSCT) mortality was investigated, including the impact of metabolic diseases.

Methods: This retrospective study conducted at a Korean tertiary hospital (2009-2021) included patients who underwent HSCT. Patients were categorized as underweight (BMI < 18.

Outcome of second allogeneic hematopoietic cell transplantation in adult patients with relapsed B-cell acute lymphoblastic leukemia in the era of new immunotherapeutic agents.

Allogeneic hematopoietic cell transplantation (allo-HCT) is still recommended as a standard treatment of choice for relapsed B-cell acute lymphoblastic leukemia (ALL). Regarding the second allo-HCT (allo-HCT2), variable comorbid conditions and leukemic evolution after previous allo-HCT may affect poor survival outcomes. With the introduction of newer immunotherapeutic agents including blinatumomab, inotuzumab ozogamicin, and ponatinib, we got more chances for allo-HCT2 expecting more promising transplantation outcomes.

Feasibility of a Total Body Irradiation-Augmented Reduced-Toxicity Conditioning Regimen with an Antithymocyte Globulin/Post-Transplantation Cyclophosphamide Combination for Haploidentical Donor Transplantation in Adult Acute Lymphoblastic Leukemia.

Haploidentical donor transplantation (HIDT) with post-transplantation cyclophosphamide (PTCy)-based graft-versus-host disease (GVHD) prophylaxis is a promising alternative donor option for adults with high-risk acute lymphoblastic leukemia (ALL). The optimal conditioning regimen and GVHD prophylaxis strategy in this patient population remain unclear, however. We evaluated a newly optimized reduced-toxicity conditioning regimen consisting of fludarabine 150 mg/m, melphalan 100 mg/m, and low-dose (400 cGy) total body irradiation (FMTBI) with GVHD prophylaxis using an antithymocyte globulin (ATG)/PTCy combination in 26 adult patients with ALL undergoing HIDT.

Atypical features of hepatic veno-occlusive disease/sinusoidal obstruction syndrome after inotuzumab ozogamicin in adult patients with acute lymphoblastic leukemia.

Purpose: Inotuzumab ozogamicin (INO) has demonstrated a safe bridging role to allogeneic hematopoietic stem cell transplantation (HSCT) in patients with relapsed or refractory B-cell acute lymphoblastic leukemia (R/R B-ALL). However, hepatic veno-occlusive disease/sinusoidal obstruction syndrome (VOD/SOS) is frequently observed. This study aimed to identify significant features of INO-associated VOD/SOS.

Multicenter validation of secondary hemophagocytic lymphohistiocytosis diagnostic criteria.

Background: Five fulfilled hemophagocytic lymphohistiocytosis (HLH)-2004 criteria, and the HScore are widely used and recommended by international expert consensus to diagnose secondary HLH. Both diagnostic scores have never been validated in heterogeneous patient cohorts of secondary HLH patients. We aimed to systematically optimize and validate diagnostic criteria of secondary HLH using a multicenter approach.

GC1126A, a novel ADAMTS13 mutein, evades autoantibodies in immune-mediated thrombotic thrombocytopenic purpura.

Immune-mediated thrombotic thrombocytopenic purpura (iTTP) is a rare and life-threatening blood disorder characterized by the formation of blood clots in small blood vessels. It is caused by antibodies targeting the A disintegrin and metalloprotease with thrombospondin type 1 repeats, member 13 (ADAMTS13), which plays a role in cleaving von Willebrand factor. Most patients with iTTP have autoantibodies against specific domains of the ADAMTS13 protein, particularly the cysteine-rich and spacer domains.

Long-term clinical outcome of a weekly 2-chlorodeoxyadenosine regimen in treatment-naïve patients with hairy cell leukemia.

Hairy cell leukemia (HCL) has a favorable clinical outcome with appropriate treatment; however, further research is needed on managing patients with relapsed or refractory disease and the risk of infection during prolonged periods. This study examined the long-term effects of 2-chlorodeoxyadenosine (2-CdA), particularly using a weekly infusion protocol, in treatment-naïve patients with HCL. This retrospective study evaluated the long-term follow-up data from 21 South Korean patients diagnosed with HCL.

Influence of Organ-Specific Extranodal Involvement on Survival Outcomes in Stage IV Diffuse Large B-Cell Lymphoma.

Background: The prognostic significance of extranodal sites in stage IV diffuse large B-cell lymphoma (DLBCL) remains uncertain, making it challenging to select appropriate treatment strategies for individual patients. In this study, we aimed to evaluate the influence of different extranodal sites on prognosis in young patients with stage IV DLBCL who achieved complete remission (CR) following initial chemo-immunotherapy and to explore the potential of autologous hematopoietic stem cell transplantation (ASCT) as a consolidation treatment for specific patient subgroups.

Methods: We retrospectively reviewed data from 119 patients with DLBCL aged < 60 years who achieved CR after chemo-immunotherapy between 2008 and 2020.

Comparison of Long-Term Outcomes of Double Unit Cord Blood Versus Haploidentical Donor Transplantation in Adult Patients With Acute Lymphoblastic Leukemia Regarding KIR-Ligand Mismatch.

Background: Haploidentical donor transplantation (HIDT) or cord blood transplantation (CBT) are common alternatives for patients lacking human-leukocyte antigen (HLA)-matched donors. In addition to the donor source, NK cell alloreactivity due to HLA-mismatch setting may affect outcomes in alternative-donor hematopoietic cell transplantation (HCT). However, a limited number of studies have evaluated their impacts in adult acute lymphoblastic leukemia (ALL).

Hematopoietic stem cell transplantation to improve prognosis in aggressive monomorphic epitheliotropic intestinal T-cell lymphoma.

Introduction: Monomorphic epitheliotropic intestinal T-cell lymphoma (MEITL) is a rare, aggressive subtype of primary gastrointestinal T-cell lymphoma. Owing to the absence of symptoms characteristic of MEITL, diagnosis can be challenging, and the low response rate to conventional chemotherapy leads to an abysmal prognosis. This study aimed to define the clinicopathologic characteristics of MEITL in Korea, evaluate the clinical outcomes of intensive chemotherapy with and without hematopoietic stem cell transplantation (HSCT), and explore prognostic factors.

Beneficial effects of cellular immunotherapy in the prevention and treatment of posttransplant hematologic relapse of myelodysplastic neoplasms.

Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the only curative option for myelodysplastic syndrome (MDS). However, relapse remains the primary cause of transplantation failure. This single-center study aimed to evaluate factors influencing therapeutic interventions to prevent overt relapse of MDS and to identify treatment approaches that ensure optimal response and safety.

The Impact of Histologic Portal T-Cell Density on the Clinical Outcomes in Hepatic Graft-versus-Host Disease and Autoimmune Liver Diseases.

Hepatic graft-versus-host disease (GVHD) significantly impacts morbidity and mortality among allogeneic hematopoietic stem cell transplant recipients. However, the relationship between clinical and immunopathological phenotypes and their influence on clinical outcomes in hepatic GVHD is not well understood. In this study, we aimed to study the implications of portal T-cell infiltration on the clinical outcomes in hepatic GHVD and its similarities to autoimmune liver disease.

Comparative analysis of reduced toxicity conditioning regimens between fludarabine plus melphalan and fludarabine plus busulfex in adult patients with acute lymphoblastic leukemia.

Reduced-toxicity conditioning (RTC) regimens aim to mitigate regimen-related toxicity while maintaining anti-leukemic efficacy in allogeneic hematopoietic stem cell transplantation (allo-HSCT). We assessed outcomes of RTC regimens utilizing melphalan versus intravenous busulfan combined with fludarabine in adult acute lymphoblastic leukemia (ALL) patients. A retrospective analysis was conducted with 149 consecutive adult ALL patients (median age 51, range 18-60) in remission undergoing allo-HSCT.

Impact of an antimicrobial stewardship programme on antibiotic utilization and resistance burden in patients with acute leukaemia: an 11-year longitudinal cohort study using interrupted time-series analysis.

Background: Antimicrobial resistance (AMR), driven by inappropriate and overuse of antibiotics, poses a significant threat, especially to patients with acute leukaemia.

Objectives: To evaluate the impact of antimicrobial stewardship programmes (ASPs) on antibiotic use and analyse temporal changes in bloodstream infections (BSI) caused by AMR organisms.

Methods: We performed a retrospective, interventional, longitudinal cohort study spanning an 11-year period.

Reduced toxicity (FluBu3) versus myeloablative (BuCy) conditioning in acute myeloid leukemia patients who received first allogeneic hematopoietic stem cell transplantation in measurable residual disease-negative CR1.

In the present study, reduced toxicity (FluBu3) and myeloablative (BuCy) conditioning were compared in patients with AML who received first allogeneic HSCT in MRD-negative CR1. The study included 124 adult patients who underwent HSCT from an HLA-matched (8/8) sibling, unrelated, or 1-locus mismatched (7/8) unrelated donor (MMUD). The median age was 45 years and intermediate cytogenetics comprised majority (71.

Diagnostic and therapeutic advances in adults with acute lymphoblastic leukemia in the era of gene analysis and targeted immunotherapy.

Acute lymphoblastic leukemia (ALL) is one of the most rapidly changing hematological malignancies with advanced understanding of the genetic landscape, detection methods of minimal residual disease (MRD), and the development of immunotherapeutic agents with good clinical outcomes. The annual incidence of adult ALL in Korea is 300-350 patients per year. The WHO classification of ALL was revised in 2022 to reflect the molecular cytogenetic features and suggest new adverse- risk subgroups, such as Ph-like ALL and ETP-ALL.

Dynamic changes in physical function during intensive chemotherapy affect transplant outcomes in older adults with AML.

Introduction: Intensive chemotherapy (IC) can affect all geriatric assessment (GA) domains in older adults with acute myeloid leukemia (AML), but data on the effects of these changes on transplant outcomes are lacking.

Methods: Therefore, we prospectively assessed the prognostic role of GA domains at diagnosis and allogeneic hematopoietic stem cell transplantation (allo-HSCT) in 51 patients with AML aged ≥60 years who achieved complete remission after IC. We performed both baseline and pre-allo-HSCT GA; moreover, physical function, including a short physical performance battery (SPPB), cognitive function, psychological function, nutritional status, and social support were examined.

The salvage role of allogeneic hematopoietic stem-cell transplantation in relapsed/refractory diffuse large B cell lymphoma.

To clarify the role of allogeneic hematopoietic stem-cell transplantation (allo-HSCT) in the chimeric antigen receptor T-cell therapy era, we analyzed the clinical characteristics and outcomes of 52 patients treated with allo-HSCT with relapsed/refractory diffuse large B cell lymphoma. Most enrolled patients had previously undergone intensive treatments, the median number of chemotherapy lines was 4, and the median time from diagnosis to allo-HSCT was 27.1 months.

Effectiveness of leukapheresis on early survival in acute myeloid leukemia: An observational propensity score matching cohort study.

Background: The association between leukapheresis (LK) as a treatment option for hyperleukocytosis (HL) in patients with acute myeloid leukemia (AML) remains controversial.

Methods: Data were extracted from the electronic medical record for 2801 patients with AML between April 2009 and December 2019. LK was performed when the leukocyte count was ≥100 × 10 /L at the time initial bone marrow examination.

Machine Learning Predicts 30-Day Outcome among Acute Myeloid Leukemia Patients: A Single-Center, Retrospective, Cohort Study.

Acute myeloid leukemia (AML) is a clinical emergency requiring treatment and results in high 30-day (D30) mortality. In this study, the prediction of D30 survival was studied using a machine learning (ML) method. The total cohort consisted of 1700 survivors and 130 non-survivors at D30.

Efficacy of inhaled tiotropium add-on to budesonide/formoterol in patients with bronchiolitis obliterans developing after hematopoietic stem cell transplantation.

Background: Bronchiolitis obliterans syndrome (BOS) is the lung manifestation of chronic graft-versus-host disease after hematopoietic stem cell transplantation (HSCT). We assessed whether inhaled tiotropium add-on to the combination regimen including budesonide/formoterol improve pulmonary function and the chronic obstructive pulmonary disease assessment test (CAT) scores in patients with BOS.

Methods: Post-HSCT patients diagnosed as BOS in Seoul St.

Efficacy of ex vivo purging with CD34+ selection to maximize the effects of autologous stem cell transplantation in peripheral T-cell lymphoma patients.

Background Aims: Peripheral T-cell lymphomas (PTCLs) are rare and aggressive tumors with uncertain optimal treatment. This study investigated the clinical outcomes of high-dose chemotherapy (HDT) followed by autologous stem cell transplantation (ASCT) after CD34+ selective purging in PTCL patients.

Methods: Retrospective analysis included 67 PTCL patients who achieved remission and underwent HDT/ASCT.