Duodenal Non-Ampullary Adenoma

**Semantic type:** Neoplastic Process

**Definition:** A non-invasive circumscribed neoplasm that arises from the glandular epithelium of the duodenum outside the ampulla of Vater. Morphologically, it is characterized by a proliferation of neoplastic glandular cells, and it is associated with dysplasia.

**Synonyms:** - Duodenal Adenoma - Non-Ampullary Adenoma