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자료유형
학술저널
저자정보
저널정보
대한임상검사과학회 대한임상검사과학회지 대한임상검사과학회지 제46권 제3호
발행연도
2014.1
수록면
91 - 98 (8page)

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Primary gastric lymphoma (PGL) is derived from mucosa-associated lymphoid tissue (MALT) and it differs from nodal lymphoma in histologic features and biologic behavior. Recent studies have showed that Helicobacter pylori (H.pylori ) infection is closely related to the development of low grade gastric lymphoma, and eradication of the infection induces regression of the tumor. H. pylori infection is known to be important to the development of gastric MALT lymphoma. The aim of this study was to elucidate the histopathological behavior of PGL according to the concept of MALT and to compare the predictive value of tests frequently used for diagnosis of H. pylori. The histological features of gastric lymphoma arising from MALT are the replacement of glands by uniform dense infiltration of centrocyte-like cells in the lamina propria and lymphoidepithelial lesion. H. pylori-associated histologic changes of neutrophilic infiltration, lymphoid follicle or aggregates formation and intestinal metaplasia, and H. pylori immunoreactivity were analyzed. Detection of H. pylori in chronic active gastritis and peptic ulcer suggests a possible role of H. pylori in the pathogenesis. Giemsa, Toluidine blue and Long H&E stains were used in H. pylori detection. Histopathological examination of gastric biopsy specimens revealed lymphoepithelial lesions pathognomonic of MALT lymphoma, and immunohistochemical staining for CD20 was diffusely positive. CD3 was positive in reactive T cells. PAX-5 was negative except the follicle. Bcl-2, cytokeratin, Ki-67, and c-myc were positive. The findings may indicate a predictable transition of low grade to high grade, and c-myc may be used as a valuable marker before molecular pathology diagnosis.

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