ToolsCalculators
Prague C & M Classification for Barrett's Esophagus
Endoscopic staging of Barrett's esophagus by circumferential and maximum extent.
Prague C & M Classification for Barrett's Esophagus
Circumferential extent (C)
cm
Maximum extent (M)
cm
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When to use
- Standardising endoscopic description of Barrett's esophagus length to guide surveillance interval and biopsy protocol.
Formula
C = circumferential extent above the gastroesophageal junction (cm); M = maximum extent, including tongues, above the gastroesophageal junction (cm). M ≥ C by definition.
Pearls and pitfalls
- Inter-observer reliability is good for segments ≥1 cm but poorer for very short segments.