Table 1

Vienna classification of gastrointestinal epithelial neoplasia

Category 1Negative for neoplasia/dysplasia
Category 2Indefinite for neoplasia/dysplasia
Category 3Non-invasive low grade neoplasia
 (low grade adenoma/dysplasia)
Category 4Non-invasive high grade neoplasia
 4.1 High grade adenoma/dysplasia
 4.2 Non-invasive carcinoma (carcinoma in situ)1-150
 4.3 Suspicion of invasive carcinoma
Category 5Invasive neoplasia
 5.1 Intramucosal carcinoma1-151
 5.2 Submucosal carcinoma or beyond

  • ↵1-150 Non-invasive indicates absence of evident invasion.

  • ↵1-151 Intramucosal indicates invasion into the lamina propria or muscularis mucosae.