Marginal zone B-Cell lymphoma among primary B-Cell lymphoma of Waldeyer's ring: histopathologic and immunohistochemical study of 16 tonsillectomy specimens

International Journal of Surgical Pathology
Masaru KojimaShigeo Nakamura

Abstract

Two subtypes of marginal zone B-cell lymphoma (eg, mucosa-associated lymphoid tissue [MALT] type and splenic type) have been reported in the lymph node. To determine the presence or absence of marginal zone B-cell lymphoma of MALT type and the splenic type among Waldeyer's ring (WR) lymphomas, 16 tonsillectomy specimens were studied. Ten cases (63%) were marginal zone B-cell lymphoma. Among marginal zone B-cell lymphoma, 7 were the MALT type and the remaining 3 cases of marginal zone B-cell lymphoma were the splenic type. Moreover, 4 cases of 7 MALT-type lymphomas contained numerous large cells (diffuse large B-cell lymphoma arising from a low-grade marginal zone B-cell lymphoma of MALT type). The low incidence of primary mucosa-associated lymphoid tissue type lymphoma of WR in previous reports may be because it is difficult to correctly identify the characteristic histologic findings of MALT-type lymphoma because of the small biopsy size.

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Oct 23, 2002·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·Masaru KojimaNobuhide Masawa
May 27, 2003·The American Journal of Surgical Pathology·Francisca I CamachoMiguel A Piris

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