title: Helicobacter pylori-related gastritis and gastric ulcer. A continuum of progressive epithelial degeneration.
abstract: One hundred forty-five consecutive gastric biopsy specimens showing colonization by Helicobacter pylori (HP) were studied. Biopsy specimens were obtained from patients with the following conditions: gastric ulcer (GU; 76), active chronic gastritis (ACG; 52), GU with duodenal ulcer (DU; 10), and ACG with DU (7). The mean age of the patients in the ACG group was 8.6 years less than the patients in the GU group. Helicobacter pylori colonization and HP-induced epithelial degeneration (ED) were quantified by a grading system (grades 0 to 6) comprising both focal and global scores for bacterial density (HP grade) and severity of ED (ED grade). The ED grade was directly proportional to the HP grade in all biopsy specimens. Gastric ulcer biopsy specimens were associated with higher HP grades: HP grade more than 5 in 25 cases (32.9%) and ED grade more than 5 in 18 cases (23.6%) of GU compared with similar respective scores in 9 cases (17.9%) and 2 cases (3.8%) of ACG. The difference was due primarily to a higher global score of bacterial density and higher focal score of ED in the GU biopsy specimens. These results support the hypothesis that HP-positive ACG and HP-positive GU are lesions within a single disease spectrum. Heavy HP colonization and severe HP-induced epithelial damage are predisposing factors in ulcerogenesis. Because HP-positive ACG is probably a preulcerative state, eradication of the bacteria in HP-positive ACG might prevent subsequent GU.
authors.affiliation: Clinical Pathology Unit, Kwong Wah Hospital, Hong Kong.
authors.forename: K M
authors.initials: KM
authors.lastname: Leung
authors.forename: P K
authors.initials: PK
authors.lastname: Hui
authors.forename: W Y
authors.initials: WY
authors.lastname: Chan
authors.forename: T M
authors.initials: TM
authors.lastname: Thomas
mesh_terms: D001706:Biopsy; D002648:Child; D002908:Chronic Disease; D004381:Duodenal Ulcer / Q000382:microbiology / Q000473:pathology; D005753:Gastric Mucosa / Q000473:pathology*; D005756:Gastritis / Q000382:microbiology* / Q000473:pathology; D016481:Helicobacter Infections / Q000382:microbiology; D016480:Helicobacter pylori / Q000302:isolation & purification*; D006801:Humans; D013276:Stomach Ulcer / Q000382:microbiology* / Q000473:pathology