Background: The aim of the present study was to investigate and discuss the incidence of gastric anomalies and pathologies among bariatric surgery patients who underwent preoperative endoscopic evaluation. Methods: Between March 2013 and March 2015, a series of obese patients, who underwent esophagogastroduodenoscopy (EGD) before bariatric surgery (sleeve gastrectomy or Roux-en-Y gastric bypass), were enrolled in the study. The demographic features, endoscopic diagnoses, gastric biopsies, and surgical data were retrospectively evaluated. Results: The study included 157 patients (108 female and 49 male) with a mean age of 43 years. The mean body mass index was 48 kg/m2. Abnormal findings were observed in 67% of the patients of whom only 17% were symptomatic. Endoscopic findings were as follows: gastritis: 54%, esophagitis: 10%, hiatal hernia: 17%, gastric ulcer: 5%, and others: 3%. Helicobacter pylori infection was investigated in 125 patients and detected in 62%. Gastric biopsies were performed in 148 pat...