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Histopathological variation of primary mucosa-associated lymphoid tissue lymphoma of the oral cavity

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Pathology & Oncology Research

Abstract

Primary mucosa-associated lymphoid tissue (MALT) type lymphoma arising in the oral cavity is rare. We examined histopathologic, immunohistological and genotypic findings of seven cases of intraoral MALT lymphoma using formalin-fixed paraffin-embedded tissues. Histologically, two variants have been delineated. (i) In four cases of minor salivary gland type, the lymphoid follicles were surrounded by centrocyte-like (CCL) cells with occasional follicular colonization. The CCL cells invaded the residual salivary gland duct resulting in a lymphoepithelial lesion. CCL cells frequently showed plasmacytic differentiation. (ii) In three cases of follicular growth type, the lesion was characterized by follicular growth pattern resulting from prominent follicular colonization. CCL cells showed minimal plasma cell differentiation. There was no residual epithelial component detected even by cytokeratin immunostaining. There were no Epstein-Barr virus-encoded small RNA-positive cells detected byin situ hybridization. API2-MALT1 fusion transcript does not appear to be associated with either histological variant of primary intraoral MALT lymphoma.

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Correspondence to Masaru Kojima M.D..

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Kojima, M., Nakamura, N., Shimizu, K. et al. Histopathological variation of primary mucosa-associated lymphoid tissue lymphoma of the oral cavity. Pathol. Oncol. Res. 13, 345–349 (2007). https://doi.org/10.1007/BF02940315

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  • DOI: https://doi.org/10.1007/BF02940315

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