start-ver=1.4
cd-journal=joma
no-vol=62
cd-vols=
no-issue=4
article-no=
start-page=195
end-page=201
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2022
dt-pub=2022
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Immunohistochemistry for IRTA1 and MNDA helps differentiate gastric MALT lymphoma from chronic gastritis/reactive lymphocyte hyperplasia
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=It is difficult to histologically differentiate extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) from chronic gastritis (CG)/ reactive lymphoid hyperplasia (RLH). To determine whether immunohistochemistry for IRTA1 and MNDA can differentiate gastric MALT lymphoma from CG/RLH, we investigated 81 stomach biopsy specimens [Wotherspoon grade (WG) 1, 11 cases; WG 2, 9 cases; WG 3, 20 cases; WG 4, 31 cases; and WG 5, 10 cases]. According to a previously reported algorithm involving PCR for immunoglobulin heavy (IgH) chain locus rearrangement, all 81 cases were divided into three groups: CG/RLH (55 cases), MALT lymphoma (19 cases) groups, and IgH undetectable group (7 cases). We analyzed the CG/RLH and MALT lymphoma groups. The median percentage of IRTA1-positive cells was 0% (range 0%-90.6%) in the CG/RLH group and 43.5% (range 0%-97.6%) in the MALT lymphoma group (p < 0.0001). The median percentage of MNDA-positive cells was 32.4% (range 0%-97.6%) in the CG/RLH group and 55.1% (range 0%-97.6%) in the MALT lymphoma group (p = 0.0044). These results indicate that immunohistochemistry for IRTA1 and MNDA can help dif-ferentiate gastric MALT lymphoma from CG/RLH.
en-copyright=
kn-copyright=

en-aut-name=AyadaYoshiyuki
en-aut-sei=Ayada
en-aut-mei=Yoshiyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=IgawaTakuro
en-aut-sei=Igawa
en-aut-mei=Takuro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NaoiYusuke
en-aut-sei=Naoi
en-aut-mei=Yusuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=HorikawaKyosuke
en-aut-sei=Horikawa
en-aut-mei=Kyosuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=TabataTetsuya
en-aut-sei=Tabata
en-aut-mei=Tetsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=TanakaTakehiro
en-aut-sei=Tanaka
en-aut-mei=Takehiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=YoshinoTadashi
en-aut-sei=Yoshino
en-aut-mei=Tadashi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

affil-num=1
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=

affil-num=2
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=

affil-num=3
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=

affil-num=4
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=

affil-num=5
en-affil=Department of Pathology, National Hospital Organization Okayama Medical Center
kn-affil=

affil-num=6
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=

affil-num=7
en-affil=Department of Pathology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences
kn-affil=
en-keyword=MALT lymphoma
kn-keyword=MALT lymphoma
en-keyword=chronic gastritis
kn-keyword=chronic gastritis
en-keyword=reactive lymphoid hyperplasia
kn-keyword=reactive lymphoid hyperplasia
en-keyword=IRTA1
kn-keyword=IRTA1
en-keyword=MNDA
kn-keyword=MNDA
END