Primary Thymic Extranodal Marginal-Zone B-Cell Lymphoma of Mucosa-Associated Lymphoid Tissue Type Exhibits Distinctive Clinicopathological and Molecular Features

Extranodal marginal-zone B-cell lymphoma (MZBL) of mucosa-associated lymphoid tissue (MALT) arising in the thymus is rare, with the largest series in the literature including only three cases. In the present study, we investigated 15 cases of thymic MALT lymphoma to systematically characterize its c...

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Veröffentlicht in:The American journal of pathology 2002-04, Vol.160 (4), p.1435-1443
Hauptverfasser: Inagaki, Hiroshi, Chan, John K.C., Ng, Josephine W.M., Okabe, Mitsukuni, Yoshino, Tadashi, Okamoto, Masataka, Ogawa, Hiroshi, Matsushita, Hiroshi, Yokose, Tomoyuki, Matsuno, Yoshihiro, Nakamura, Naoya, Nagasaka, Tetsuro, Ueda, Ryuzo, Eimoto, Tadaaki, Nakamura, Shigeo
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container_end_page 1443
container_issue 4
container_start_page 1435
container_title The American journal of pathology
container_volume 160
creator Inagaki, Hiroshi
Chan, John K.C.
Ng, Josephine W.M.
Okabe, Mitsukuni
Yoshino, Tadashi
Okamoto, Masataka
Ogawa, Hiroshi
Matsushita, Hiroshi
Yokose, Tomoyuki
Matsuno, Yoshihiro
Nakamura, Naoya
Nagasaka, Tetsuro
Ueda, Ryuzo
Eimoto, Tadaaki
Nakamura, Shigeo
description Extranodal marginal-zone B-cell lymphoma (MZBL) of mucosa-associated lymphoid tissue (MALT) arising in the thymus is rare, with the largest series in the literature including only three cases. In the present study, we investigated 15 cases of thymic MALT lymphoma to systematically characterize its clinical, histopathological, and molecular features. There was a marked female predilection (male:female = 1:4), with a mean age of 55 years at diagnosis. There was a strong association with autoimmune disease, especially Sjögren's syndrome. Histologically, the thymic lymphoma showed the characteristic morphological features of extranodal MZBL of MALT type. Cysts were common. Prominent lymphoepithelial lesions were formed by centrocyte-like cells infiltrating and expanding the Hassall's corpuscles and epithelium lining the cysts. Plasmacytic differentiation was apparent in all cases. Notably, 13 of 15 cases expressed immunoglobulin (Ig) A phenotype; IgA expression in thymic MALT lymphoma was in striking contrast with the IgM phenotype observed in most of the Sjögren's syndrome-associated MZBLs and MALT lymphomas at other sites. Epstein-Barr virus was absent, and API2-MALT1 gene fusion, a recently reported MALT lymphoma-specific gene abnormality, was not detected in any case. Although one patient died of disease 85 months after the diagnosis, other patients were alive with overall 3-year and 5-year survival rates being 89% and 83%, respectively. Among the 22 patients reported previously and in the present series, at least 17 patients (77%) were Asians. These data indicate that thymic MALT lymphoma may represent a distinct subgroup of MALT lymphoma characterized by apparent predilection for Asians, a strong association with autoimmune disease, frequent presence of cysts, consistent plasma cell differentiation, tumor cells expressing IgA phenotype, and consistent lack of API2-MALT1 gene fusion.
doi_str_mv 10.1016/S0002-9440(10)62569-2
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In the present study, we investigated 15 cases of thymic MALT lymphoma to systematically characterize its clinical, histopathological, and molecular features. There was a marked female predilection (male:female = 1:4), with a mean age of 55 years at diagnosis. There was a strong association with autoimmune disease, especially Sjögren's syndrome. Histologically, the thymic lymphoma showed the characteristic morphological features of extranodal MZBL of MALT type. Cysts were common. Prominent lymphoepithelial lesions were formed by centrocyte-like cells infiltrating and expanding the Hassall's corpuscles and epithelium lining the cysts. Plasmacytic differentiation was apparent in all cases. Notably, 13 of 15 cases expressed immunoglobulin (Ig) A phenotype; IgA expression in thymic MALT lymphoma was in striking contrast with the IgM phenotype observed in most of the Sjögren's syndrome-associated MZBLs and MALT lymphomas at other sites. Epstein-Barr virus was absent, and API2-MALT1 gene fusion, a recently reported MALT lymphoma-specific gene abnormality, was not detected in any case. Although one patient died of disease 85 months after the diagnosis, other patients were alive with overall 3-year and 5-year survival rates being 89% and 83%, respectively. Among the 22 patients reported previously and in the present series, at least 17 patients (77%) were Asians. These data indicate that thymic MALT lymphoma may represent a distinct subgroup of MALT lymphoma characterized by apparent predilection for Asians, a strong association with autoimmune disease, frequent presence of cysts, consistent plasma cell differentiation, tumor cells expressing IgA phenotype, and consistent lack of API2-MALT1 gene fusion.</description><identifier>ISSN: 0002-9440</identifier><identifier>EISSN: 1525-2191</identifier><identifier>DOI: 10.1016/S0002-9440(10)62569-2</identifier><identifier>PMID: 11943727</identifier><identifier>CODEN: AJPAA4</identifier><language>eng</language><publisher>Bethesda, MD: Elsevier Inc</publisher><subject>Adult ; Aged ; Biological and medical sciences ; Female ; Hematologic and hematopoietic diseases ; Humans ; Immunohistochemistry ; Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis ; Lymphoma, B-Cell, Marginal Zone - genetics ; Lymphoma, B-Cell, Marginal Zone - metabolism ; Lymphoma, B-Cell, Marginal Zone - pathology ; Male ; Medical sciences ; Middle Aged ; Regular ; Thymus Neoplasms - genetics ; Thymus Neoplasms - metabolism ; Thymus Neoplasms - pathology</subject><ispartof>The American journal of pathology, 2002-04, Vol.160 (4), p.1435-1443</ispartof><rights>2002 American Society for Investigative Pathology</rights><rights>2002 INIST-CNRS</rights><rights>Copyright American Society for Investigative Pathology Apr 2002</rights><rights>Copyright © 2002, American Society for Investigative Pathology</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c618t-105b5670cc780572e5a7f7e11301ba84188e272810b43098ffde2811081916933</citedby><cites>FETCH-LOGICAL-c618t-105b5670cc780572e5a7f7e11301ba84188e272810b43098ffde2811081916933</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1867201/pdf/$$EPDF$$P50$$Gpubmedcentral$$H</linktopdf><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0002-9440(10)62569-2$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,727,780,784,885,3548,27922,27923,45993,53789,53791</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=13636254$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11943727$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Inagaki, Hiroshi</creatorcontrib><creatorcontrib>Chan, John K.C.</creatorcontrib><creatorcontrib>Ng, Josephine W.M.</creatorcontrib><creatorcontrib>Okabe, Mitsukuni</creatorcontrib><creatorcontrib>Yoshino, Tadashi</creatorcontrib><creatorcontrib>Okamoto, Masataka</creatorcontrib><creatorcontrib>Ogawa, Hiroshi</creatorcontrib><creatorcontrib>Matsushita, Hiroshi</creatorcontrib><creatorcontrib>Yokose, Tomoyuki</creatorcontrib><creatorcontrib>Matsuno, Yoshihiro</creatorcontrib><creatorcontrib>Nakamura, Naoya</creatorcontrib><creatorcontrib>Nagasaka, Tetsuro</creatorcontrib><creatorcontrib>Ueda, Ryuzo</creatorcontrib><creatorcontrib>Eimoto, Tadaaki</creatorcontrib><creatorcontrib>Nakamura, Shigeo</creatorcontrib><title>Primary Thymic Extranodal Marginal-Zone B-Cell Lymphoma of Mucosa-Associated Lymphoid Tissue Type Exhibits Distinctive Clinicopathological and Molecular Features</title><title>The American journal of pathology</title><addtitle>Am J Pathol</addtitle><description>Extranodal marginal-zone B-cell lymphoma (MZBL) of mucosa-associated lymphoid tissue (MALT) arising in the thymus is rare, with the largest series in the literature including only three cases. 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In the present study, we investigated 15 cases of thymic MALT lymphoma to systematically characterize its clinical, histopathological, and molecular features. There was a marked female predilection (male:female = 1:4), with a mean age of 55 years at diagnosis. There was a strong association with autoimmune disease, especially Sjögren's syndrome. Histologically, the thymic lymphoma showed the characteristic morphological features of extranodal MZBL of MALT type. Cysts were common. Prominent lymphoepithelial lesions were formed by centrocyte-like cells infiltrating and expanding the Hassall's corpuscles and epithelium lining the cysts. Plasmacytic differentiation was apparent in all cases. Notably, 13 of 15 cases expressed immunoglobulin (Ig) A phenotype; IgA expression in thymic MALT lymphoma was in striking contrast with the IgM phenotype observed in most of the Sjögren's syndrome-associated MZBLs and MALT lymphomas at other sites. Epstein-Barr virus was absent, and API2-MALT1 gene fusion, a recently reported MALT lymphoma-specific gene abnormality, was not detected in any case. Although one patient died of disease 85 months after the diagnosis, other patients were alive with overall 3-year and 5-year survival rates being 89% and 83%, respectively. Among the 22 patients reported previously and in the present series, at least 17 patients (77%) were Asians. These data indicate that thymic MALT lymphoma may represent a distinct subgroup of MALT lymphoma characterized by apparent predilection for Asians, a strong association with autoimmune disease, frequent presence of cysts, consistent plasma cell differentiation, tumor cells expressing IgA phenotype, and consistent lack of API2-MALT1 gene fusion.</abstract><cop>Bethesda, MD</cop><pub>Elsevier Inc</pub><pmid>11943727</pmid><doi>10.1016/S0002-9440(10)62569-2</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Biological and medical sciences
Female
Hematologic and hematopoietic diseases
Humans
Immunohistochemistry
Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis
Lymphoma, B-Cell, Marginal Zone - genetics
Lymphoma, B-Cell, Marginal Zone - metabolism
Lymphoma, B-Cell, Marginal Zone - pathology
Male
Medical sciences
Middle Aged
Regular
Thymus Neoplasms - genetics
Thymus Neoplasms - metabolism
Thymus Neoplasms - pathology
title Primary Thymic Extranodal Marginal-Zone B-Cell Lymphoma of Mucosa-Associated Lymphoid Tissue Type Exhibits Distinctive Clinicopathological and Molecular Features
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