Barrett esophagus is defined histologically as replacement of normal squamous epithelium by specialized intestinal-type epithelium with goblet cells in the distal esophagus. Which option best captures this definition?

Barrett esophagus is defined histologically as replacement of normal squamous epithelium by specialized intestinal-type epithelium with goblet cells in the distal esophagus. Which option best captures this definition?

• A. Basal cell hyperplasia with elongation of lamina propria papillae.
• B. Replacement of normal squamous epithelium by specialized intestinal-type epithelium with goblet cells in the distal esophagus.
• C. Hyperplastic columnar epithelium with goblet cells in proximal esophagus.
• D. Glandular metaplasia to cardiac-type epithelium.

Answer: (B)

Barrett esophagus is marked by intestinal metaplasia in the distal esophagus, meaning the normal squamous lining is replaced by specialized intestinal-type epithelium that includes goblet cells. This goblet-cell–containing columnar epithelium in the distal esophagus is the hallmark that distinguishes Barrett's from ordinary reflux changes. That description matches the idea of replacement of the distal esophageal squamous mucosa with intestinal-type epithelium containing goblet cells. The other options don’t fit: basal cell hyperplasia with elongated papillae reflects reflux esophagitis changes but not intestinal metaplasia. Goblet cells in the proximal esophagus would place the metaplasia in the wrong location. Glandular metaplasia to cardiac-type epithelium lacks goblet cells and does not describe intestinal metaplasia. So the best description is the distal esophagus showing replacement by specialized intestinal-type epithelium with goblet cells.

Barrett esophagus is marked by intestinal metaplasia in the distal esophagus, meaning the normal squamous lining is replaced by specialized intestinal-type epithelium that includes goblet cells. This goblet-cell–containing columnar epithelium in the distal esophagus is the hallmark that distinguishes Barrett's from ordinary reflux changes.

That description matches the idea of replacement of the distal esophageal squamous mucosa with intestinal-type epithelium containing goblet cells. The other options don’t fit: basal cell hyperplasia with elongated papillae reflects reflux esophagitis changes but not intestinal metaplasia. Goblet cells in the proximal esophagus would place the metaplasia in the wrong location. Glandular metaplasia to cardiac-type epithelium lacks goblet cells and does not describe intestinal metaplasia. So the best description is the distal esophagus showing replacement by specialized intestinal-type epithelium with goblet cells.