title: Antral hyperplastic polyp causing intermittent gastric outlet obstruction: case report.
abstract: BACKGROUND
  Hyperplastic polyps are the most common polypoid lesions of the stomach. Rarely, they cause gastric outlet obstruction by prolapsing through the pyloric channel, when they arise in the prepyloric antrum.
  
  
  METHODS
  A 62-year-old woman presented with intermittent nausea and vomiting of 4 months duration. Upper gastrointestinal endoscopy revealed a 30 mm prepyloric sessile polyp causing intermittent gastric outlet obstruction. Following submucosal injection of diluted adrenaline solution, the polyp was removed with a snare. Multiple biopsies were taken from the greater curvature of the antrum and the corpus. Rapid urease test for Helicobacter pylori yielded a negative result. Histopathologic examination showed a hyperplastic polyp without any evidence of malignancy. Biopsies of the antrum and the corpus revealed gastritis with neither atrophic changes nor Helicobacter pylori infection. Follow-up endoscopy after a 12-week course of proton pomp inhibitor therapy showed a complete healing without any remnant tissue at the polypectomy site. The patient has been symptom-free during 8 months of follow-up.
  
  
  CONCLUSIONS
  Symptomatic gastric polyps should be removed preferentially when they are detected at the initial diagnostic endoscopy. Polypectomy not only provides tissue to determine the exact histopathologic type of the polyp, but also achieves radical treatment.
authors.affiliation: Department of Gastrointestinal Surgery, Marmara University Institute of Gastroenterology, Istanbul, Turkey. rgencosmanoglu@marmara.edu.tr
authors.forename: Rasim
authors.initials: R
authors.lastname: Gencosmanoglu
authors.forename: Ebru
authors.initials: E
authors.lastname: Sen-Oran
authors.forename: Ozlem
authors.initials: O
authors.lastname: Kurtkaya-Yapicier
authors.forename: Nurdan
authors.initials: N
authors.lastname: Tozun
mesh_terms: D016099:Endoscopy, Gastrointestinal; D005260:Female; D017219:Gastric Outlet Obstruction / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D011127:Polyps / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D011391:Prolapse; D011706:Pyloric Antrum; D013272:Stomach Diseases / Q000150:complications* / Q000175:diagnosis / Q000601:surgery