obsolete_Duodenal Gastrin-Producing Neuroendocrine Tumor true A gastrin-producing neuroendocrine tumor that arises from the duodenum. It is characterized by the presence of uniform cells that form pseudorosettes. The neoplastic cells have uniform nuclei and small amount of eosinophilic cytoplasm. http://purl.obolibrary.org/obo/MONDO_0004411 NCIt:C5731 3.81.0 Duplicate. Use: http://purl.obolibrary.org/obo/MONDO_0004411