title: Marginal zone B-Cell lymphoma among primary B-Cell lymphoma of Waldeyer's ring: histopathologic and immunohistochemical study of 16 tonsillectomy specimens.
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.
authors.affiliation: Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan. mkojima@gunma-cc.jp
authors.forename: Masaru
authors.initials: M
authors.lastname: Kojima
authors.forename: Naoya
authors.initials: N
authors.lastname: Nakamura
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Shimizu
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Tamaki
authors.forename: Hideaki
authors.initials: H
authors.lastname: Itoh
authors.forename: Shigeo
authors.initials: S
authors.lastname: Nakamura
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D002648:Child; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008221:Lymphoid Tissue / Q000737:chemistry / Q000473:pathology*; D018442:Lymphoma, B-Cell, Marginal Zone / Q000737:chemistry / Q000473:pathology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D014067:Tonsillar Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000628:therapy; D014068:Tonsillectomy
chemical_list: D014408:Biomarkers, Tumor