Digestive System Intraepithelial Neoplasia

**Semantic type:** Neoplastic Process

**Definition:** A non-invasive neoplastic process that affects the epithelium of any part of the digestive system. It is characterized by the presence of morphologic features of dysplasia (e.g., architectural and cytological epithelial alterations) or, in a minority of cases, lack of such morphologic features, as in colonic sessile serrated adenomas/polyps.

**Synonyms:** - Gastrointestinal Intraepithelial Neoplasia - Gastrointestinal Noninvasive Neoplasia - Gastrointestinal System Intraepithelial Neoplasia