title: Clinicopathological study of background gastric mucosa during long-term conservative maintenance therapy for intractable peptic ulcer.
abstract: We studied the background gastric mucosa in eight patients with intractable peptic ulcer in whom gastric cancer developed during more than 4 years' administration of histamine (H)2-receptor antagonists (H2-RAs), and in two patients with intractable gastric ulcer without gastric cancer in whom H2-RAs were administered for 4 years. As controls, we studied background mucosa in seven patients with combined gastroduoderal ulcers not treated with H2-RAs. The cancers were differentiated adenocarcinomas in all eight patients. The characteristic features of these patients and of the two patients with intractable gastric ulcer were: expansion of the generative cell zone, poor differentiation of the goblet cells, mild cellular atypia, and abnormal branching and anastomosis of glands, as well as wide areas of incomplete-type intestinal metaplasia. The sites of the differentiated adenocarcinomas were classified by mucin histochemistry as intestinal-type mucosa in all patients. A special type of incomplete intestinal metaplasia, of the intestinal type and which retained gastric-type properties, was present in some areas, and p53-positive cells were observed in some areas. In patients with intractable gastric ulcer in whom the background gastric mucosa had been exposed to more than 4 years of H2-RA treatment, it was considered possible that the preconditions for cancerous lesions were present.
authors: Department of Surgery II, The Jikei University School of Medicine, Tokyo, Japan.
authors: H
authors: H
authors: Nimura
authors: S
authors: S
authors: Takayama
mesh_terms: D000230:Adenocarcinoma / Q000209:etiology / Q000378:metabolism / Q000473:pathology; D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor; D018450:Disease Progression; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000473:pathology*; D006635:Histamine H2 Antagonists / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008679:Metaplasia / Q000473:pathology; D008875:Middle Aged; D009077:Mucins / Q000378:metabolism; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000209:etiology / Q000378:metabolism / Q000473:pathology; D013276:Stomach Ulcer / Q000150:complications / Q000188:drug therapy* / Q000473:pathology; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D014408:Biomarkers, Tumor; D006635:Histamine H2 Antagonists; D009077:Mucins; D018809:Proliferating Cell Nuclear Antigen; D016159:Tumor Suppressor Protein p53