label: Small Intestinal Gastrin-Producing Neuroendocrine Tumor
label_lc: small intestinal gastrin-producing neuroendocrine tumor
description: A gastrin-producing neuroendocrine tumor that arises from the small intestine.  It is characterized by the presence of uniform cells that form pseudorosettes.  The neoplastic cells have uniform nuclei and small amount of eosinophilic cytoplasm.