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Biclonal lymphoplasmacytic immunocytoma associated with Crohn's disease

T Hara1, S Ozaki, M Kosaka

  • 1First Department of Internal Medicine, School of Medicine, University of Tokushima.

Internal Medicine (Tokyo, Japan)
|July 20, 1999
PubMed

Insights

Chronic inflammation in Crohn's disease may lead to the development of two distinct B-cell cancers. This study found evidence of biclonal lymphoplasmacytic immunocytoma in a patient with Crohn's disease.

Area of Science:

  • Gastroenterology
  • Oncology
  • Immunology

Background:

  • Crohn's disease is a chronic inflammatory condition.
  • Inflammatory conditions are associated with an increased risk of certain cancers.
  • The link between chronic inflammation and lymphoproliferative disorders is an area of ongoing research.

Observation:

  • A patient with a history of Crohn's disease presented with ascites and an abdominal tumor.
  • Serum analysis revealed two distinct M-protein peaks: immunoglobulin (Ig) G-kappa and IgA-kappa.
  • Neoplastic lymphoplasmacytic cells were found in the bone marrow and ascites, and infiltrated the abdominal tumor.

Findings:

  • Histological examination confirmed a proliferation of lymphoplasmacytic cells positive for either IgG or IgA.
  • DNA sequencing revealed distinct gene sequences in the complementarity-determining region 3 for both IgG and IgA.
  • These findings suggest the simultaneous development of two distinct B-cell clones.

Implications:

  • Chronic inflammation in Crohn's disease may be a contributing factor to the development of biclonal lymphoplasmacytic immunocytoma.
  • This case highlights a potential, albeit rare, complication of long-standing inflammatory bowel disease.
  • Further research is warranted to understand the mechanisms linking chronic inflammation to lymphomagenesis in Crohn's disease.

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