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Related Concept Videos

Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
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  11. Histomorphologic Spectrum Of Nodal Marginal Zone Lymphoma As Defined By Its Methylome.
  1. Home
  3. Research Domains
  5. Biomedical And Clinical Sciences
  7. Immunology
  9. Immunology Not Elsewhere Classified
  11. Histomorphologic Spectrum Of Nodal Marginal Zone Lymphoma As Defined By Its Methylome.

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Histomorphologic spectrum of nodal marginal zone lymphoma as defined by its methylome.

Francesca Spada1, Andreas Rosenwald2, Wolfram Klapper3

  • 1Institute of Pathology, Ulm University, Ulm, Germany.

American Journal of Clinical Pathology
|October 7, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Methylome analysis reveals distinct patterns in nodal marginal zone lymphoma (NMZL), clarifying its diverse morphology. This study provides a new method to differentiate NMZL from nodal diffuse large B-cell lymphoma (nDLBCL).

Keywords:
marginal zone lymphomamethylomemorphometricsoperational definition

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Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • Primary nodal marginal zone lymphoma (NMZL) is a rare B-cell lymphoma with significant histological variability.
  • Distinguishing NMZL with large-cell morphology from nodal diffuse large B-cell lymphoma (nDLBCL) is challenging due to a lack of specific markers.

Purpose of the Study:

  • To investigate the methylome of NMZL and nDLBCL to identify distinguishing features.
  • To define the morphological spectrum of NMZL and develop a reliable method for differentiating it from nDLBCL.

Main Methods:

  • Methylome analysis was performed on comprehensive cohorts of NMZL and nDLBCL.
  • Morphometric analysis was used to compare growth patterns and cytology between NMZL and nDLBCL.
  • A hierarchical classifier incorporating cell size, nuclear size, growth pattern, follicular colonization, follicular dendritic network, IgD expression, and Ki-67 rate was developed.

Main Results:

  • Methylomes showed significant differences between NMZL and nDLBCL cohorts, but were homogeneous within the NMZL cohort.
  • A morphometric approach using cell and nuclear size effectively separated NMZL from nDLBCL.
  • The developed classifier demonstrated utility in distinguishing these lymphoma subtypes.

Conclusions:

  • Methylome profiling has elucidated the morphological spectrum of NMZL, including large-cell presentations.
  • A novel, conventional method is proposed for distinguishing NMZL from nDLBCL, aiding in accurate diagnosis.