Pancreatic Intraepithelial Neoplasia-1B

**Semantic type:** Neoplastic Process

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

**Synonyms:** - PanIN-1B - PanIN-1B