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It is possible that the main title of the report Pancreatic Neuroendocrine Neoplasms (pNENs) is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Pancreatic neuroendocrine neoplasms (pNENs) are an increasingly common group of malignancies that arise within the endocrine tissue of the pancreas. Endocrine tissue is specialized tissue that contains hormone-secreting cells. These cells secrete several different hormones into the blood (endocrine) or to local cells (paracrine, autocrine). These hormones have a variety of functions within the body. Neoplasms that arise from endocrine tissue may also secrete hormones, resulting in excessive levels of these hormones in the body and potentially a wide variety of symptoms. Although there is no difference in diagnosis and therapy, pNENs can be differentiated as functioning or nonfunctioning. Functioning pNENs secrete hormones into the bloodstream, which cause special symptoms; nonfunctioning neoplasms may produce hormones, but no systemic symptoms. Nonfunctioning neuroendocrine neoplasms can still cause symptoms relating to tumor size and location such as obstruction or internal bleeding. There are several different subtypes of functioning pNENs distinguished by the specific type of hormone that they secrete. Most pNENs occur sporadically. They have some different differentiation (G1-3), but all of them have the potential for malignant transformation. Most pNENs occur sporadically, but in some cases, pNENs may occur as part of a larger genetic syndrome such as multiple endocrine neoplasia type 1 (MEN1) or von Hippel Lindau (VHL) syndrome.
Pancreatic cancer as a general term usually refers to pancreatic adenocarcinoma, an aggressive malignant cancer with a poor prognosis. Approximately 95 percent of pancreatic malignancies are adenocarcinomas, for which the prognoses are in general worse than the prognosis of G1- and G2 pNENs. G3 neuroendocrine carcinomas have the same poor prognosis as pancreatic adenocarinomas.
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This is an abstract of a report from the National Organization for Rare Disorders (NORD). A copy of the complete report can be downloaded free from the NORD website for registered users. The complete report contains additional information including symptoms, causes, affected population, related disorders, standard and investigational therapies (if available), and references from medical literature. For a full-text version of this topic, go to www.rarediseases.org and click on Rare Disease Database under "Rare Disease Information".
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It is possible that the title of this topic is not the name you selected. Please check the Synonyms listing to find the alternate name(s) and Disorder Subdivision(s) covered by this report
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Last Updated: 6/9/2011
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