RT Journal Article T1 An unusual endoscopic presentation of diffuse duodenal gastric heterotopia. A1 Gómez Espejo, Sandra María A1 Fernández Pérez, Francisco A1 Gutiérrez Hernández, Pilar A1 Pereda Salgado, Teresa AB We present the case of a 30-year-old female patient with Gilbert's syndrome and gastrointestinal intolerance to proton pump inhibitors (PPI) with longstanding epigastric pain. Laboratory tests were unremarkable, except for a slight elevation of indirect bilirubin due to Gilbert's syndrome. An upper gastrointestinal tract endoscopy showed a diffuse and homogeneous micropolypoid mucosal pattern that involved the entire duodenal bulb. Histopathology analysis revealed gastric heterotopic mucosa with foveolar epithelium and fundic glands. A diagnosis of diffuse duodenal gastric heterotopia was determined. Anti-H2 blockers were prescribed with a significant clinical improvement. SN 1130-0108 YR 2020 FD 2020 LK http://hdl.handle.net/10668/15438 UL http://hdl.handle.net/10668/15438 LA en DS RISalud RD Apr 7, 2025