Pancreatic Intraepithelial Neoplasia-1

**Semantic type:** Neoplastic Process

**Definition:** A pancreatic intraepithelial neoplasia characterized by the presence of tall columnar cells that form flat or papillary, micropapillary, and basally pseudostratified architectural patterns. Mild cytological atypia is present.

**Synonyms:** - Grade 1 Pancreatic Intraepithelial Neoplasia - Grade I Pancreatic Intraepithelial Neoplasia - PanIN-1