title: Type or extension of intestinal metaplasia and immature/atypical "indefinite-for-dysplasia" lesions as predictors of gastric neoplasia.
abstract: At present, no information exists on the neoplastic potential of the immature hyperproliferative and atypical lesions of the gastric mucosa, which have been recently labeled "indefinite for dysplasia." In addition, uncertainties still exist concerning the risk contribution of intestinal metaplasia (IM) type and extension, as well as Helicobacter pylori infection. In this study, 471 dyspeptic patients showing IM 10% or higher (median, 40; 25th-75th percentile, 20-60) in antral, angulus, or corpus endoscopic biopsies were submitted to repeated examinations (median, 3; 2-5) over 52 (26-85) months of follow-up, during which 44 neoplastic cases were recorded. IM extension, incomplete, sulfomucin-positive, or CAR5 antigen-positive IM; H pylori infection; and indefinite-for-dysplasia lesions (IDLs), as found at first examination, all showed significant neoplastic potential. However, only IDL, ongoing H pylori infection, and patient's age retained independent predictive power in a multivariate model. On the other hand, IM extension 20% or higher proved to be more sensitive as first screening parameter for identification of subjects with increased neoplastic risk. We suggest that patients with IM, when infected, should undergo H pylori eradication to reduce their cancer risk; only those bearing IDL or very extensive IM (which strongly correlates with IDL) should be followed up with endoscopies and biopsies.
authors.affiliation: Department of Pathology, University of Pavia and IRCCS Policlinico San Matteo, Pavia, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Tava
authors.forename: Ombretta
authors.initials: O
authors.lastname: Luinetti
authors.forename: Maria Rosa
authors.initials: MR
authors.lastname: Ghigna
authors.forename: Costanza
authors.initials: C
authors.lastname: Alvisi
authors.forename: Maurizio
authors.initials: M
authors.lastname: Perego
authors.forename: Erminio
authors.initials: E
authors.lastname: Trespi
authors.forename: Catherine
authors.initials: C
authors.lastname: Klersy
authors.forename: Cesare
authors.initials: C
authors.lastname: Fratti
authors.forename: Roberto
authors.initials: R
authors.lastname: Fiocca
authors.forename: Enrico
authors.initials: E
authors.lastname: Solcia
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D005753:Gastric Mucosa / Q000473:pathology; D016481:Helicobacter Infections / Q000473:pathology; D016480:Helicobacter pylori / Q000302:isolation & purification; D006801:Humans; D007422:Intestines / Q000473:pathology*; D008297:Male; D008679:Metaplasia / Q000473:pathology*; D008875:Middle Aged; D015999:Multivariate Analysis; D011230:Precancerous Conditions / Q000473:pathology*; D012306:Risk; D013274:Stomach Neoplasms / Q000209:etiology / Q000473:pathology*