Neuroendocrine tumor G1 (NET G1) / Carcinoid
Duodenal endocrine cell tumors are divided into five main groups: gastrin-containing G-cell tumors, somatostatin-containing D-cell tumors, other well-differentiated endocrine cell tumors, the gangliocytic paraganglioma, and /small cell carcinomas (poorly differentiated endocrine carcinomas). The term gastrinoma is reserved for G-cell tumors that produce hypergastrinemia and are the source of the Zollinger-Ellison syndrome. D-cell tumors are the type associated with the Psammomatous somatostatinoma of the ampulla of Vater and periampullary region
Riddell RH, Petras RE, Williams GT, Sobin LH.
Tumors of the Intestines.
Atlas of Tumor Pathology, 3rd Series, Fascicle 32,
Armed Forces Institute of Pathology: Washington, DC 2003
Hamilton SR, Aaltonen LA (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of the Digestive System.
IARC Press: Lyon 2000