# Barrett Oesophagus Surveillance > Barrett oesophagus for NEET-PG Surgery: intestinal metaplasia diagnosis, Prague C&M, Seattle protocol biopsies, RFA for dysplasia and fundoplication limits. - Canonical URL: https://prepelephant.com/topics/neet-pg/surgery/barrett-oesophagus-surveillance - Exam / course: NEET-PG · Subject: Surgery - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "Barrett Oesophagus Surveillance", PrepElephant, https://prepelephant.com/topics/neet-pg/surgery/barrett-oesophagus-surveillance ## Direct answer Columnar metaplasia with intestinal metaplasia replacing the distal squamous lining — Barrett oesophagus — is the strongest recognised precursor of oesophageal adenocarcinoma, and the reason long-standing reflux earns an endoscopy. Confirmed nondysplastic Barrett is surveyed endoscopically every three to five years with protocolised four-quadrant biopsies; confirmed dysplasia shifts management to endoscopic therapy — endoscopic mucosal resection for visible lesions and radiofrequency ablation for flat dysplasia — while oesophagectomy is reserved for disease beyond the mucosa. Antireflux surgery controls symptoms but does not reliably regress metaplasia or abolish cancer risk, so surveillance continues after fundoplication. ## What you must remember - The diagnosis requires intestinal metaplasia on biopsy from a visibly abnormal segment; a columnar-looking z-line without intestinal metaplasia is not Barrett in most guidelines. - Prague C&M classification records the circumferential (C) and maximal (M) extent of the segment in centimetres; segments of 3 cm or more are "long-segment" and carry higher progression risk than short segments. - Progression from nondysplastic Barrett to adenocarcinoma is slow — commonly quoted around 0.1–0.5% per year — which is why surveillance rather than ablation is the default. - Seattle protocol: four-quadrant biopsies every 2 cm along the segment (every 1 cm in dysplasia) plus targeted biopsies of any visible abnormality. - Surveillance interval: 3–5 years for nondysplastic disease; indefinite-for-dysplasia and low-grade dysplasia shorten this, with low-grade confirmed by an expert pathologist generally offered ablation. - Visible lesions (nodules, ulcers) are removed by endoscopic mucosal resection first — histology of the lesion then stages the field; flat dysplasia is ablated (radiofrequency ablation is standard). - High-grade dysplasia or intramucosal carcinoma confined to the mucosa is managed endoscopically in most fit-for-endoscopy patients; submucosal invasion (sm2/sm3), uncertain margins or multifocal disease tilt towards oesophagectomy. - Chemoprevention: high-dose proton-pump inhibitor plus aspirin showed benefit in the AspECT trial — a modern, quotable fact. - After fundoplication, surveillance continues: the metaplastic segment, once present, is monitored regardless of symptomatic success. ## Reading a report and deciding the pathway A 54-year-old man with two decades of reflux symptoms has his first endoscopy: an irregular z-line with a 5 cm circumferential columnar segment extending 8 cm maximally — Prague C5M8 — with no nodularity. Seattle-protocol biopsies every 2 cm report intestinal metaplasia without dysplasia. He enters a surveillance programme: repeat endoscopy in three to five years, PPI therapy, weight and lifestyle counsel. The reasoning is arithmetic as much as biology — at roughly a fraction of a percent per year, his cumulative risk over five years does not justify ablation's costs and stricture risk, but it does justify protocolised re-inspection. Two years later a report reads "focal low-grade dysplasia". Before acting, the slides are reviewed by an expert pathologist — regeneration mimics dysplasia, and overcalling low grade is a recognised problem. Confirmed, the flat segment undergoes radiofrequency ablation, eradicating the metaplasia and dropping progression risk substantially. Now suppose the same segment harbours a 12 mm nodule: the nodule is not ablated — it is resected by endoscopic mucosal resection, because visible lesions may already harbour invasive disease, and the histology of that resected disc decides between continued endoscopic therapy and oesophagectomy. ## Where students slip The first error is the "fundoplication cures Barrett" reflex: surgery restores the antireflux barrier and resolves symptoms, but established metaplasia persists, and the examined answer is that surveillance continues after the operation. The second is biopsy technique — reporting "biopsies from the oesophagus: benign" without acknowledging the protocol; random nicks from the distal cm miss the very dysplasia surveillance exists to find, and the Seattle quadrants every 2 cm is the phrase that earns the mark. The third is ablation zeal in nondysplastic disease: at the population level the numbers favour surveillance, reserving ablation for confirmed dysplasia — a nuance examiners probe by asking "would you ablate a C2M3 segment with no dysplasia in a 40-year-old?" where the safe general answer is surveillance, with ablation discussed for select young patients with long segments. ## Frequently asked questions ### What histological finding establishes the diagnosis of Barrett oesophagus? Intestinal metaplasia (goblet cells) in biopsies from a visibly columnar-lined distal oesophagus; columnar change without intestinal metaplasia does not qualify under most guidelines. ### What is the Prague classification? A C&M system documenting the circumferential (C) and maximal (M) extent of the columnar segment in centimetres from the top of the gastric folds to the squamocolumnar junction. ### What is the Seattle biopsy protocol? Four-quadrant biopsies at 2 cm intervals along the Barrett segment (1 cm intervals if dysplasia is known) plus targeted samples of visible lesions, processed separately by level. ### How often is nondysplastic Barrett surveyed? Every three to five years per current guidance, contingent on adequate protocol biopsies. ### How is confirmed dysplasia managed? Visible lesions undergo endoscopic mucosal resection for histology; flat low- or high-grade dysplasia is treated with radiofrequency ablation, followed by intensive surveillance until eradication. ### Does antireflux surgery remove the cancer risk? No — fundoplication controls reflux symptoms but does not reliably regress metaplasia or abolish progression, so surveillance endoscopy continues after the operation.