Ampulla of Vater Enterochromaffin Cell Serotonin-Producing Neuroendocrine Tumor

**Semantic type:** Neoplastic Process

**Definition:** A well-differentiated neuroendocrine tumor that arises from the ampulla of Vater and the periampullary region. It produces serotonin.

**Synonyms:** - Ampulla of Vater EC Cell Serotonin-Producing NET - Ampulla of Vater EC-Cell Serotonin-Producing Neuroendocrine Tumor - Enterochromaffin Cell Serotonin-Producing Neuroendocrine Tumor of the Ampullary Region