title: Superficially located enlarged lymphoid follicles characterise nodular gastritis.
abstract: Nodular gastritis is a form of chronic Helicobacter pylori gastritis affecting the gastric antrum and characterised endoscopically by the presence of small nodular lesions resembling gooseflesh. It is generally accepted that hyperplasia of lymphoid follicles histologically characterises nodular gastritis; however, quantitative analysis in support of this hypothesis has not been reported. Our goal was to determine whether nodular gastritis is characterised by lymphoid follicle hyperplasia.The number, size, and location of lymphoid follicles in nodular gastritis were determined and those properties compared to samples of atrophic gastritis. The percentages of high endothelial venule (HEV)-like vessels were also evaluated.The number of lymphoid follicles was comparable between nodular and atrophic gastritis; however, follicle size in nodular gastritis was significantly greater than that seen in atrophic gastritis. Moreover, lymphoid follicles in nodular gastritis were positioned more superficially than were those in atrophic gastritis. The percentage of MECA-79 HEV-like vessels was greater in areas with gooseflesh-like lesions in nodular versus atrophic gastritis.Superficially located hyperplastic lymphoid follicles characterise nodular gastritis, and these follicles correspond to gooseflesh-like nodular lesions observed endoscopically. These observations suggest that MECA-79 HEV-like vessels could play at least a partial role in the pathogenesis of nodular gastritis.
authors.affiliation: 1Department of Molecular Pathology, Shinshu University Graduate School of Medicine 2Division of Gastroenterology, Department of Medicine, Shinshu University School of Medicine, Matsumoto 3Division of Tumor Pathology, Department of Pathological Sciences, Faculty of Medical Sciences, University of Fukui, Eiheiji, Japan.
authors.forename: Takuma
authors.initials: T
authors.lastname: Okamura
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Sakai
authors.forename: Hitomi
authors.initials: H
authors.lastname: Hoshino
authors.forename: Yugo
authors.initials: Y
authors.lastname: Iwaya
authors.forename: Eiji
authors.initials: E
authors.lastname: Tanaka
authors.forename: Motohiro
authors.initials: M
authors.lastname: Kobayashi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000954:Antigens, Surface / Q000032:analysis / Q000096:biosynthesis; D015815:Cell Adhesion Molecules; D002648:Child; D002675:Child, Preschool; D004730:Endothelium, Vascular / Q000378:metabolism; D005260:Female; D005753:Gastric Mucosa / Q000473:pathology*; D005756:Gastritis / Q000382:microbiology / Q000473:pathology*; D016481:Helicobacter Infections / Q000150:complications; D016480:Helicobacter pylori; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis / Q000096:biosynthesis; D007150:Immunohistochemistry; D008221:Lymphoid Tissue / Q000098:blood supply / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008565:Membrane Proteins / Q000032:analysis / Q000096:biosynthesis; D008875:Middle Aged; D009088:Mucoproteins / Q000032:analysis / Q000096:biosynthesis; D055815:Young Adult
chemical_list: D000954:Antigens, Surface; D015815:Cell Adhesion Molecules; D007136:Immunoglobulins; C069886:L-selectin counter-receptors; C504265:MADCAM1 protein, human; D008565:Membrane Proteins; D009088:Mucoproteins