Macroscopically demonstrable heterotopic gastric mucosa in the duodenum.
D000328:Adult; D000368:Aged; D001706:Biopsy; D004386:Duodenum / Q000002:abnormalities*; D004415:Dyspepsia / Q000209:etiology; D004724:Endoscopy; D005260:Female; D005336:Fiber Optic Technology; D005745:Gastric Acidity Determination; D005753:Gastric Mucosa / Q000002:abnormalities*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans; D007413:Intestinal Mucosa / Q000002:abnormalities*; D007417:Intestinal Polyps / Q000209:etiology; D008297:Male; D008875:Middle Aged