Solitary epithelial cells in B cell gastric MALT lymphoma.

Abstract:

BACKGROUND:Gastric mucosa associated lymphoid tissue (MALT) lymphoma is a low grade B cell lymphoma histologically characterised by neoplastic B cells surrounding follicles in a marginal zone pattern and selectively infiltrating epithelium to form characteristic lymphoepithelial lesions. AIMS:To identify solitary epithelial cells in gastric MALT lymphoma and investigate their nature. METHODS:Anonymised endoscopic biopsies from eight B cell gastric MALT lymphomas and 10 control biopsies from chronic atrophic gastritis were selected. The numbers of solitary cytokeratin positive epithelial cells were assessed both semiquantitatively and quantitatively in immunostained sections. Chromogranin A expression was studied in sections consecutive to those stained for cytokeratin. RESULTS:Statistical analysis of the quantitative data confirmed that solitary epithelial cells were significantly more common in the lymphomas. The study of consecutive sections showed that the single cells express chromogranin A. CONCLUSIONS:The presence of solitary, cytokeratin positive epithelial cells within the neoplastic infiltrate is a characteristic feature of gastric B cell lymphoma. These solitary epithelial cells are of neuroendocrine origin.

journal_name

J Clin Pathol

authors

Sutak J,Stoddard C,Smith ME

doi

10.1136/jcp.2004.023747

keywords:

subject

Has Abstract

pub_date

2005-11-01 00:00:00

pages

1226-8

issue

11

eissn

0021-9746

issn

1472-4146

pii

58/11/1226

journal_volume

58

pub_type

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