Gallbladder Flat Biliary Intraepithelial Neoplasia

**Semantic type:** Neoplastic Process

**Definition:** Biliary intraepithelial neoplasia that affects the gallbladder epithelium. It is characterized by the absence of intraluminal micropapillary projections.

**Synonyms:** - Gallbladder Flat BilIN - Gallbladder Flat Intraepithelial Neoplasia