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Updated: Jun 22, 2025

Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation

Published on: November 26, 2018

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Spontaneous Regression Accompanied by Concomitant Immune Alterations in a Patient with Chronic Lymphocytic Leukemia

Gonzalo Blanco1,2, Edward Morris3, Jodie L Morris4

  • 1Karches Center for Oncology Research, The Feinstein Institutes for Medical Research, Northwell Health, Manhasset, NY, USA.

Annals of Case Reports
|June 28, 2024
PubMed

Insights

Spontaneous regression (SR) of chronic lymphocytic leukemia (CLL) involves immune activation, particularly monocytes and B2M. This rare event shows distinct phases, suggesting potential new immunotherapies for CLL.

Area of Science:

  • Immunology
  • Hematology
  • Oncology

Background:

  • Spontaneous regression (SR) of chronic lymphocytic leukemia (CLL) is rare, occurring in 0.2%-1% of cases.
  • While tumor genetics are studied, the immunological mechanisms driving SR remain largely unknown.
  • Understanding SR could reveal novel therapeutic targets for CLL.

Purpose of the Study:

  • To elucidate the immunological events and dynamics associated with spontaneous regression in chronic lymphocytic leukemia (CLL).
  • To identify distinct phases of regression and their immunological markers.
  • To explore potential immune-based mechanisms underlying SR in CLL.

Main Methods:

  • Case series observation of patients experiencing spontaneous regression of CLL.
  • Monitoring of peripheral blood CLL cell counts, adenopathy, monocyte counts, B2M levels, and serum IgG bands.
  • Characterization of immunological events during spontaneous regression (SR) and persistent regression (PR) phases.

Main Results:

  • Identified a SR phase characterized by >99% CLL cell reduction, adenopathy resolution, increased monocytes, high B2M, and an oligoclonal IgG band.
  • Described a subsequent persistent regression (PR) phase maintained for ≥17 months.
  • Observed that monocytes and B2M play a role in SR, potentially linked to immune activation.

Conclusions:

  • SR in CLL involves specific immunological events, including a role for monocytes and B2M.
  • The persistence of an oligoclonal IgG band suggests either malignant cell differentiation or a normal B cell anti-tumor response.
  • Findings imply immune and molecular mechanisms for malignant cell elimination, potentially guiding new CLL immunotherapies.

Keywords:
Immunoglobulin G (IgG)MonocytesPersistent Regression (PR)Spontaneous Regression (SR)β−2 Microglobulin (B2M)

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