Gastroenterology · USMLE Step 1 and Step 2

Barrett Esophagus song

Barrett Esophagus - Metaplasia & Cancer Risk, as a song. Hear the short teaser here. The full song is on YouTube and Spotify.

Barrett Esophagus

Full song on YouTube ↗Spotify ↗

Key points in this song10

Barrett esophagus is metaplasia of normal stratified squamous epithelium to specialized intestinal metaplasia (columnar epithelium with goblet cells) caused by chronic gastroesophageal reflux disease.
Goblet cells on biopsy are the histologic hallmark required for diagnosis; their presence confirms intestinal metaplasia and distinguishes Barrett from gastric-type columnar metaplasia.
The greatest risk factor is chronic GERD (>5 years), with additional risk factors including male sex, age >50, obesity, white race, and smoking.
Barrett esophagus is a premalignant condition that follows the metaplasia → dysplasia → adenocarcinoma sequence, conferring a 30–40× increased risk of esophageal adenocarcinoma.
Adenocarcinoma arising from Barrett esophagus classically occurs in the distal esophagus and gastroesophageal junction, in contrast to squamous cell carcinoma, which occurs in the upper and middle thirds.
Surveillance endoscopy with biopsy is the cornerstone of management; frequency depends on degree of dysplasia — no dysplasia warrants repeat EGD every 3–5 years.
Low-grade dysplasia is managed with increased surveillance (every 6–12 months) or endoscopic eradication therapy, while high-grade dysplasia requires endoscopic eradication (radiofrequency ablation or endoscopic mucosal resection).
Long-term proton pump inhibitor therapy is used to control reflux and may slow progression, but does not reverse established Barrett metaplasia.
On endoscopy, Barrett esophagus appears as salmon-colored (red) tongues of mucosa extending proximal to the gastroesophageal junction, confirmed only by biopsy showing goblet cells.
The classic USMLE vignette presents an obese, middle-aged white male with longstanding heartburn who undergoes endoscopy revealing columnar-lined distal esophagus with goblet cells on biopsy.