A 52-year-old man with a 10-year history of peptic ulcer disease presents with epigastric pain. Endoscopy reveals a 2 cm ulcer on the anterior wall of the duodenum with a clean base. Which single feature best distinguishes a duodenal ulcer from a gastric ulcer in this patient?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.