title: Duodenal gangliocytic paraganglioma, a rare entity among GEP-NET: a case report with immunohistochemical and molecular study.
abstract: Gastroenteropancreatic neuroendocrine tumors are the most incident neuroendocrine tumors. In the new WHO classification (2010) the embryological derivation of each neoplastic entity is one of the most important parameters. Gangliocytic Paraganglioma is a tumor originating in the hindgut, a rare neoplasm, generally affecting the second portion of the duodenum, the majority of which are benign.Cases of gangliocytic paraganglioma with local metastasis or local recurrence have also been reported.We describe a GP in a 48-year-old caucasian male with an unusual site (4th portion of duodenum) and an interesting immunohistochemical and molecular pattern. In particular, we examined the expression of some neuroendocrine markers and a marker of neuronal differentiation, NeuroD1, whose expression can help to better understand the nature of this neoplasia.
  The virtual slides for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/3720959161096807.
authors.forename: Fabiana
authors.initials: F
authors.lastname: Tatangelo
authors.affiliation: Pathology Division, Istituto Nazionale Tumori "Fondazione G Pascale"-IRCCS, Naples, Italy. monicantile@libero.it.
authors.forename: Monica
authors.initials: M
authors.lastname: Cantile
authors.forename: Alessia
authors.initials: A
authors.lastname: Pelella
authors.forename: Nunzia Simona
authors.initials: NS
authors.lastname: Losito
authors.forename: Giosuè
authors.initials: G
authors.lastname: Scognamiglio
authors.forename: Franco
authors.initials: F
authors.lastname: Bianco
authors.forename: Andrea
authors.initials: A
authors.lastname: Belli
authors.forename: Gerardo
authors.initials: G
authors.lastname: Botti
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis*; D004379:Duodenal Neoplasms / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D010236:Paraganglioma, Extra-Adrenal / Q000378:metabolism / Q000473:pathology*; D060888:Real-Time Polymerase Chain Reaction
chemical_list: D014408:Biomarkers, Tumor