Spurious endoscopic biopsy.
D000368:Aged; D001706:Biopsy; D004381:Duodenal Ulcer / Q000175:diagnosis*; D004724:Endoscopy; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D008297:Male; D008460:Meat; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000175:diagnosis*; D013276:Stomach Ulcer / Q000175:diagnosis*