ISSN:
1569-8041
Keywords:
bacterial flora
;
Helicobacter pylori
;
immunohisochemistry
;
MALT
;
primary gastric lymphoma
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract Background: Primary gastric non-Hodgkin's lymphomas possibly develop in response to local infection by Helicobacter pylori (H. pylori). We investigated the presence of H. pylori and non–H. pylori flora histologically in small- and large-cell primary gastric lymphoma using a specific staining method. Materials and methods: Specimens of 52 cases of primary gastric lymphoma(17 small cell, 35 large cell) were stained with modified Giemsa (MG) and immunohistochemically using a polyclonal antibody against H. pylori (IHC). Results: Thirty-two cases (61.5%) (small cell 76% versus large cell 53%,P 〉 0.05) showed immunoreactivity for H. pylori in the mucosa surrounding the tumor. Remarkable, there waslocalization of H. pylori in the neck of the gastric glands in 3 cases.Non– H. pylori flora was seen in 35 cases (76.3%) (small cell53% versus large cell 74%,P 〉 0.05). In 20cases, this non– H. pylori flora was mixed with H. pylori. Five cases showed no bacterial flora at all. Conclusions: (1)Using immunohistochemistry, the prevalence of gastriclymphoma cases with H. pylori (61.5%) approximates that of H. pylori in the normal population. (2) No statistical difference was found between the occurrence of H. pylori and non–H. pyloribacterial flora in small- versus large-cell lymphoma. (3) Our results suggest that H. pylori may not be the only etiologic factor in primary gastric lymphoma.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008205510594
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