[Preneoplastic gastric lesions and helicobacter pylori in endoscopic detection and early diagnosis of gastric cancer in a population of a medium and high socio-economic level].

Objectives: To determine the prevalence and characteristics of premalignant gastric lesions and its relationship with helicobacter pylori infection.

Methods: We performed a cross-sectional retrospective study. Between january and june 2008, consecutive subjects of middle and high socioeconomic status were evaluated by upper gastrointestinal endoscopy during a gastric cancer screening in Central FAP Hospital.

[Prevalence, clinical-endoscopic characteristics and predictive factors of Barrett's Esophagus in endoscopic screening for gastric cancer].

Purpose: Determine the prevalence, clinical-epidemiological characteristics and predictive factors for Barrets Esophagus (BE).

Method: An analytical and transversal study was conducted, followed by a case-control study nested in a population participating in a gastric cancer screening campaign, from January to June 2008 at the Central Hospital of the Peruvian Air Force (FAP). A BE case was defined due to the endoscopic presence of columnar-appearing mucosa confirmed by intestinal metaplasia at biopsy.