Advances in Pathology of Lymphoma and Leukemia

A special issue of Cancers (ISSN 2072-6694). This special issue belongs to the section "Cancer Pathophysiology".

Deadline for manuscript submissions: 31 August 2025 | Viewed by 466

Special Issue Editor


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Guest Editor
Pathology and Laboratory Medicine, University of Vermont Medical Center, Burlington, VT, USA
Interests: leukemia; lymphoma; immunohistochemical stains; next-generation sequencing; cytogenetics; flow cytometry analysis

Special Issue Information

Dear Colleagues,

The subspecialty of hematopathology witnesses constant evolution and paragdims shifts. New advances in the realm of leukemia and lymphoma are released daily, helping hematopathologists and hemato-oncologists fine-tune the diagnostics, theragnostics and prognostics of hematolymphoid diseases.

In this Special Issue, we aim to provide a venue for recent advances in leukemia and lymphoma, from a hematopathology perspective. The publications will cover a broad range from adult to pediatric diseases, spanning the worlds of both leukemia and lymphoma, with a special highlight on associated ancillary testing, including immunohistochemical stains, next-generation sequencing, cytogenetics and flow cytometry analysis, among others.

We hope that this Special Issue will provide valuable insights to the readers and will contribute to enhancing their daily clinical practice.

Dr. Siba El Hussein
Guest Editor

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Keywords

  • leukemia
  • lymphoma
  • immunohistochemical stains
  • next-generation sequencing
  • cytogenetics
  • flow cytometry analysis

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Published Papers (1 paper)

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Research

22 pages, 1223 KiB  
Article
Association Between B-Cell Marker Expression and RUNX1 Lesions in Acute Myeloid Leukemia, Beyond RUNX1::RUNX1T1 Fusion: Diagnostic Pitfalls with Mixed-Phenotype Acute Leukemia—B/Myeloid
by Giby V. George, Malgorzata Kajstura, Audrey N. Jajosky, Hong Fang, Fatima Zahra Jelloul, Andrew G. Evans, W. Richard Burack, John M. Bennett, L. Jeffrey Medeiros, Wei Wang and Siba El Hussein
Cancers 2025, 17(), 1354; https://doi.org/10.3390/cancers17081354 - 18 Apr 2025
Viewed by 167
Abstract
Acute myeloid leukemia (AML) with RUNX1::RUNX1T1 fusion is well known to often demonstrate aberrant upregulation of CD19 expression. We studied the clinicopathologic and genetic features of 16 cases of AML with various RUNX1 lesions, including mutations, copy number gains, and translocations [...] Read more.
Acute myeloid leukemia (AML) with RUNX1::RUNX1T1 fusion is well known to often demonstrate aberrant upregulation of CD19 expression. We studied the clinicopathologic and genetic features of 16 cases of AML with various RUNX1 lesions, including mutations, copy number gains, and translocations other than fusions with RUNX1T1. Most of these cases were classified as AML-myelodysplasia-related or AML-post-cytotoxic therapy based on the cytogenetic and molecular work-up. These neoplasms showed partial expression of one or more B-cell antigens by flow cytometry and/or immunohistochemistry, fulfilling the criteria for mixed-phenotype acute leukemia (MPAL)-B/myeloid (i.e., ≥20% blasts expressing B and myeloid lineage antigens) in most cases. These findings suggest that AML cases with RUNX1 lesions including mutations, copy number gains, and translocations other than RUNX1T1 fusion, also commonly express B-cell markers, imparting a “mixed-lineage-like” immunophenotype in cases of AML that otherwise fulfill the criteria for other defined subtypes. We present these cases as to caution regarding this potential diagnostic pitfall and favor a diagnosis of AML with RUNX1 lesion(s) in the setting of a case of AML with myeloid/B-cell antigen expression, a history of myelodysplasia or cytotoxic therapy, the demonstration of pDC differentiation by flow cytometry (generally associated with the presence of a RUNX1 mutation), and the presence of a RUNX1 lesion (mutation, copy number gain, and/or translocation exclusive of a rearrangement with RUNX1T1). Full article
(This article belongs to the Special Issue Advances in Pathology of Lymphoma and Leukemia)
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