Barrett Esophagus and Esophageal Adenocarcinoma
A 55-year-old man with 20 years of daily heartburn undergoes upper endoscopy. It shows a 4 cm segment of salmon-colored mucosa above the gastroesophageal junction, a 2 cm sliding hiatal hernia, a short benign peptic stricture, and linear erosions in the distal esophagus. Biopsies of the salmon-colored segment show intestinal metaplasia with goblet cells and no dysplasia. Which of these findings carries the greatest risk of progression to esophageal adenocarcinoma?
- A.Peptic stricture of the distal esophagus
- B.Intestinal metaplasia of the distal esophagusCorrect
- C.Sliding hiatal hernia
- D.Erosive reflux esophagitis
Explanation
Intestinal metaplasia of the distal esophagus, that is Barrett esophagus, is the established precursor lesion of esophageal adenocarcinoma and the single strongest risk factor among the findings listed. Chronic acid and bile reflux injures squamous epithelium, which is replaced by columnar epithelium containing goblet cells; this metaplastic mucosa can then progress through low-grade and high-grade dysplasia to invasive adenocarcinoma. The annual risk of adenocarcinoma in nondysplastic Barrett esophagus is roughly 0.3 percent, rising sharply once high-grade dysplasia appears, which is why endoscopic surveillance with four-quadrant biopsies is recommended and dysplastic segments are treated with endoscopic resection and radiofrequency ablation. Peptic stricture, hiatal hernia, and erosive esophagitis all reflect the severity of reflux and are markers of the underlying exposure, but none of them is itself a premalignant lesion. Note that the histologic type matters: adenocarcinoma arises in the distal esophagus from Barrett metaplasia and is linked to reflux and obesity, whereas squamous cell carcinoma affects the mid esophagus and is linked to smoking, alcohol, achalasia, caustic strictures, and hot beverages. Long-standing reflux of more than 5 years, male sex, age above 50, obesity, and smoking are the criteria used to select patients for screening endoscopy. Proton pump inhibitor therapy controls symptoms and may reduce progression but does not remove the need for surveillance.
Why each option
- A.
- A benign peptic stricture reflects severe acid exposure and causes dysphagia, but it is not itself a premalignant lesion; caustic strictures are linked to squamous carcinoma.
- B.
- Correct. Columnar intestinal metaplasia with goblet cells is Barrett esophagus, the direct precursor of esophageal adenocarcinoma, and it mandates endoscopic surveillance.
- C.
- A hiatal hernia promotes reflux and correlates with Barrett esophagus, but it confers no independent malignant potential.
- D.
- Erosive esophagitis indicates active mucosal injury and heals with proton pump inhibitor therapy; it is not a dysplastic or premalignant lesion.
Reference: ACG Clinical Guideline: Diagnosis and Management of Barrett's Esophagus, 2022; UpToDate 2025, Barrett's esophagus: Epidemiology, clinical manifestations, and diagnosis
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