Publications by authors named "Khalid Halahleh"

Natural killer (NK)/T-cell lymphomas (NKTCLs) are rare, aggressive lymphomas prevalent in East Asia and South America. Despite improvements, largely due to asparaginase-based therapies, outcomes for advanced disease remain poor, and the role of autologous stem cell transplantation (auto-HCT) remains controversial. This study evaluated real-world outcomes of auto-HCT in NKTCL patients across Asia and Europe.

View Article and Find Full Text PDF

Introduction: Survival post-hematopoietic stem cell transplantation (HCT) is improving, with an increasing number of survivors. Subsequent neoplasms (SNs) following HCTs are of particular concern.

Methods: Between January 2003 and December 2022, HCT recipients' records were retrospectively reviewed.

View Article and Find Full Text PDF

Checkpoint inhibitors (CPIs) have shown remarkable efficacy in Hodgkin lymphoma (HL), and are now used routinely. While allogeneic hematopoietic cell transplantation (allo-HCT) remains a curative option for HL, there are concerns prior CPIs may exacerbate post-allo-HCT complications, particularly graft-versus-host disease (GVHD), and lead to worse outcomes. Given the relative paucity of data, we performed a Center for International Blood and Marrow Transplant Research/European Society for Blood and Marrow Transplantation study to examine the impact of prior CPIs in allo-HCT.

View Article and Find Full Text PDF

Background: The treatment of acute and chronic graft-versus-host disease (GvHD) remains a challenge, particularly in cases of steroid-refractory GvHD. The management of GvHD varies between institutions, and little is known regarding the practices in different regions of the world. Thus, the Worldwide Network for Blood and Marrow Transplantation has developed a questionnaire to understand the current practices of GvHD management in the Eastern Mediterranean (EM) region.

View Article and Find Full Text PDF

Introduction: Primary Mediastinal Large B Cell Lymphoma (PMLBCL) is a rare but aggressive B-cell lymphoma. This study compares the outcomes and toxicities of DA-EPOCH-R (Dose-adjusted etoposide, prednisolone, vincristine, cyclophosphamide, and doxorubicin in combination with rituximab) and RCHOP-21 (rituximab, cyclophosphamide, doxorubicin, and vincristine, every 21 days) in the treatment of newly diagnosed PMLBCL.

Methods: We retrospectively reviewed the medical records of adults (>18 years) diagnosed with PMLBCL and treated at our center from 2010 to 2023.

View Article and Find Full Text PDF

The use of post-transplant cyclophosphamide (PTCy) for graft-versus-host disease (GVHD) prophylaxis in severe aplastic anemia (SAA) remains understudied, particularly beyond haploidentical transplants. We analyzed outcomes of SAA patients who underwent stem cell transplantation (SCT) with PTCy from haploidentical donors (n = 209), HLA-matched sibling donors (MSD, n = 70), and unrelated donors (UD, n = 69) using EBMT data from 2010 to 2022. Median age was 22 years, and median time to transplantation was 8.

View Article and Find Full Text PDF

Chronic granulomatous disease (CGD) is an inborn error of immunity characterized by defective NAD phosphate oxidase function, leading to impaired microbial killing, recurrent infections, and granulomatous inflammation. Allogeneic hematopoietic stem cell transplantation (HSCT) is a curative treatment for CGD, particularly effective when a fully HLA-matched donor is available. However, the place of HLA-haploidentical HSCT remains less established.

View Article and Find Full Text PDF

Introduction: Poor graft function (PrGF) is a serious complication of allogeneic hematopoietic cell transplantation (allo-HCT), and current therapies are only partially effective. Eight published reports on the effect of eltrombopag on PrGF showed encouraging results. This study aimed to assess the safety and efficacy of eltrombopag for the treatment of PrGF after allo-HCT.

View Article and Find Full Text PDF

Introduction: Peripheral blood (PB) grafts are increasingly used in haploidentical hematopoietic stem cell transplantation (haplo-HSCT) with post-transplant cyclophosphamide (PT-Cy). The optimal timing for initiation of immunosuppression (IS) with calcineurin inhibitors (CNI) and mycophenolate mofetil (MMF) in PB haplo-HSCT is unclear. This study evaluates the outcomes of early initiation of IS prior to PT-Cy.

View Article and Find Full Text PDF
Article Synopsis
  • * A study reviewed 166 patient records, focusing on 143 without prior central nervous system (CNS) involvement, and analyzed the outcomes of those who received TBI with or without CRB.
  • * Results showed no significant differences in relapse rates or survival between patients with and without CRB, indicating that adding CRB may not provide extra benefits in preventing relapses after transplantation.
View Article and Find Full Text PDF

Allogeneic hematopoietic stem cell transplantation (HSCT) is the only established curative option for Fanconi anemia (FA)-associated bone marrow failure (BMF)/aplastic anemia (AA) and acute myeloid leukemia (AML)/myelodysplastic syndrome (MDS). We performed a retrospective multicenter study on 813 children with FA undergoing first HSCT between 2010 and 2018. Median duration of follow-up was 3.

View Article and Find Full Text PDF
Article Synopsis
  • A study compared the effectiveness of posttransplant cyclophosphamide (PTCy) versus conventional calcineurin inhibitor (CNI)-based regimens for preventing graft-versus-host disease (GVHD) in patients with Hodgkin lymphoma undergoing hematopoietic stem cell transplantation (HSCT) from HLA-matched donors.
  • Results showed that while PTCy was linked to slower recovery of blood cells, it significantly reduced the risk of chronic GVHD and improved long-term survival measures, including overall survival (OS) and progression-free survival (PFS).
  • Overall, PTCy exhibited better outcomes in reducing relapse rates and improving survival compared to CNI-based prophylaxis in this patient group, suggesting it may be a
View Article and Find Full Text PDF
Article Synopsis
  • Allogeneic hematopoietic cell transplantation (allo-HCT) is recommended for patients with core-binding factor mutated (CBF) acute myeloid leukemia (AML) who have achieved second complete remission (CR2), though 20% may relapse after the procedure.
  • A study analyzed outcomes from 865 CBF AML patients undergoing allo-HCT with different donor types (haploidentical, matched siblings, and matched unrelated donors) across 227 centers, revealing that haploidentical transplants were linked to a lower relapse incidence compared to the other donor types.
  • CBF-AML patients with the inv(16) mutation had better outcomes regarding relapse, overall survival, and graft-versus-host disease-free survival
View Article and Find Full Text PDF

Selecting the most suitable alternative donor becomes challenging in severe aplastic anemia (SAA) when a matched sibling donor (MSD) is unavailable. We compared outcomes in patients with SAA undergoing stem cell transplantation (SCT) from matched unrelated donors (MUD) (n = 1106), mismatched unrelated donors (MMUD) (n = 340), and haploidentical donors (Haplo) (n = 206) registered in the European Society for Blood and Marrow Transplantation database (2012-2021). For Haplo SCT, only those receiving posttransplant cyclophosphamide for graft-versus-host disease (GVHD) prophylaxis were included.

View Article and Find Full Text PDF

One of the most frequently used methods for quantifying PD-L1 (programmed cell death-ligand 1) expression in tumor tissue is IHC (immunohistochemistry). This may predict the patient's response to anti-PD1/PD-L1 therapy in cancer. ImageJ software was used to score IHC-stained sections for PD-L1 and compare the results with the conventional manual method.

View Article and Find Full Text PDF

Background: Cancer patients are at higher risk of serious complications of COVID-19. Few studies evaluated the impact of COVID-19 on cancer patients in low- and middle-income countries. Our study aims to evaluate the outcomes of COVID-19 infection in cancer patients treated at our institution.

View Article and Find Full Text PDF

A majority of patients included in risk assessment models (RAMs) developed to predict venous thromboembolic events (VTE) in lymphoma were non-Hodgkin lymphoma. Our study aims to evaluate the incidence and predictors of VTE, utilizing different RAMs, in patients with classic Hodgkin lymphoma (cHL) treated with adriamycin, bleomycin, vinblastine, and dacarbazine (ABVD). : Adult patients with cHL, treated and followed at our center, were included.

View Article and Find Full Text PDF

Background: In early stage diffuse large B-cell lymphoma (ESDLBL), tumor bulkiness is an important determinant of treatment and prognosis. Tumor bulk is usually measured on transverse computed tomography (CT) plane and variably defined from 5 to 10 cm.

Objectives: Our study aims to investigate the prognostic significance of bulky disease measured on CT coronal and transverse planes and to evaluate the outcome of patients with bulky disease.

View Article and Find Full Text PDF

Background And Objectives: Early T-cell precursor (ETP) acute lymphoblastic leukemia/lymphoma (ALL/LBL) is a newly recognized entity of T-lymphoblastic leukemia/lymphoma. The optimal therapeutic approaches to adult patients are poorly studied.

Patients And Methods: We compared the outcomes of adult's patents with ETP-ALL/LBL who received frontline chemotherapy regimens with other T-ALL/LBL immunophenotypic subtypes.

View Article and Find Full Text PDF
Article Synopsis
  • Hematopoietic cell transplantation (HCT) can cure high-risk patients but often leads to serious complications, including graft dysfunction and non-infectious pulmonary issues (NIPCs), with inadequate treatment options available.
  • Poor graft function (PGF) affects 5-30% of patients post-transplant, lacking established guidelines for definition and treatment, while NIPCs have high mortality rates and unclear causes.
  • New approaches like adjusting conditioning regimens and using complement inhibitors have improved management of complications like transplant-associated thrombotic microangiopathy (TA-TMA), transforming it from a deadly risk to a more treatable condition.
View Article and Find Full Text PDF

Objectives: Patterns and predictors of relapse in primary gastric diffuse large B cell lymphoma (DLBCL) were variably reported. Our study aims to evaluate the patterns and predictors of relapse in early-stage gastric DLBCL treated with Rituximab, Cyclophosphamide, Doxorubicin, Vincristine, and Prednisolone (RCHOP).

Methods: From 2005 to 2019, the medical records of 72 patients with stage I or stage II gastric DLBCL treated with six cycles of RCHOP without radiotherapy were reviewed.

View Article and Find Full Text PDF

Background: Data on whether the graft CD3-positive (CD3) T-cell dose in T-cell-replete human leukocyte antigen (HLA)-mismatched allogeneic hematopoietic peripheral blood stem cells transplantation (PBSCT) influences post-transplant outcomes are controversial.

Methods: Using King Hussein Cancer Center (KHCC) Blood and Marrow Transplantation (BMT) Registry database, 52 adult subjects, receiving the first T-cell-replete HLA-mismatched allogeneic hematopoietic PBSCT for acute leukemias or myelodysplastic syndrome, were identified, from January 2017 to December 2020. The cutoff value of graft CD3 T-cell dose was identified using the receiver operating characteristic (ROC) formula and Youden's analysis.

View Article and Find Full Text PDF

Purpose: Primary mediastinal large B-cell Lymphoma (PMLBCL) is a rare aggressive lymphoma with unique clinical, pathological, and molecular features. The optimal frontline therapy is subject of ongoing debate. Our study aims to evaluate the outcomes of PMLBCL treated with rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (RCHOP) at King Hussein Cancer Center.

View Article and Find Full Text PDF

The aim of the study was to assess the predictive value of interim FDG-PET/CT (iPET) in patients with Hodgkin's lymphoma (HL) treated with Adriamycin, bleomycin, vinblastine and dacarbazine (ABVD) chemotherapy. A total of 245 consecutive patients with de novo HL between 12/2013 and 12/2017 were evaluated retrospectively. All patients were treated with upfront ABVD, performed PET/CT scans at baseline, after 2 cycles (interim PET, iPET2) or 4 cycles (iPET4) and at the end of therapy, and followed up for at least 6 months after therapy.

View Article and Find Full Text PDF