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Peptic Ulcer Disease I: Introduction

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Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
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Related Experiment Video

Updated: Nov 20, 2025

Author Spotlight: Anterior HR-OCT as a Non-Invasive Tool for Characterizing Ocular Surface Squamous Neoplasia

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Unilateral alar ulceration

Patrick S Phelan¹, Zachary P Nahmias, Shayna L Gordon²

¹Washington University School of Medicine in St. Louis, Missouri, USA.

|January 20, 2021

Summary

No abstract available in PubMed .

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