Revised ViennaBarrett's Epithelial Neoplasia GradingPatient ExplanationHistopathological FindingsCategory 1Negative for neoplasia/dysplasia.Category 2Indefinite for neoplasia/dysplasia.Category 3Non-invasive low-grade neoplasia (LGD).Category 4Non-invasive high-grade neoplasia (HGD).Category 5Invasive neoplasia (Carcinoma).Determine Management PathPathology ClassifierSelect the histological grade to visualize the international consensus management pathway.