Gallbladder Tubular Carcinoid

**Semantic type:** Neoplastic Process

**Definition:** A neuroendocrine tumor that arises from the gallbladder. It does not show the morphologic characteristics of typical carcinoid tumors (neoplastic cells forming solid nests). In contrast, the tumor cells form small discrete tubules.

**Synonyms:** - Gallbladder Tubular Carcinoid Tumor