title: The rare presentations of a large polyp and an esophageal carcinoma in heterotropic gastric mucosa: a case series.
abstract: BACKGROUND
  Heterotopic gastric mucosa (HGM) is commonly seen in the upper esophagus during endoscopyand is generally considered a benign disease. A hyperplastic polyp and an adenocarcinoma arising in heterotopic gastric mucosa are quite rare occurences.
  
  
  METHODS
  We present two cases: The first is a patient who suffered from dysphagia because of a large hyperplastic polyp that arose from HGM; the polyp was excised endoscopically. Secondly, we report a rare case of adenocarcinoma arising in HGM of the cervical esophagus.
  
  
  CONCLUSIONS
  Morphologic changes or malignant transformation can develop in the inlet patch. Therefore, gastroenterologists should be aware of the possibility of HGM just distal to the upper esophageal sphincter.
authors.affiliation: Department of Internal Medicine, Faculty of Medicine, Division of Gastroenterology, Gazi University Hospital, Ankara, Turkey. hakanalagoz@gazi.edu.tr.
authors.forename: Hakan
authors.initials: H
authors.lastname: Alagozlu
authors.forename: Meltem
authors.initials: M
authors.lastname: Ergun
authors.forename: Mehmet
authors.initials: M
authors.lastname: Cindoruk
authors.forename: Selahattin
authors.initials: S
authors.lastname: Unal
authors.forename: Sukru
authors.initials: S
authors.lastname: Dumlu
authors.forename: Aylar
authors.initials: A
authors.lastname: Poyraz
authors.forename: Ayse
authors.initials: A
authors.lastname: Dursun