Abstract Library

#1490 Even Malignant Appendiceal Neuroendocrine Tumors Exhibit No Recurrent Chromosomal Alterations

Introduction: Neuroendocrine tumors (NETs) of the midgut are located in the ileum (iNET), caecum or appendix (aNET). Despite of the similar origin, NETs of the ileum and the appendix behave remarkably different. iNETs show high malignant potential, which manifests with early lymph node or liver metastases. Genetically, the loss of chromosome 18 (Ch18) in 60-74% of cases is the most frequent alteration in iNETs. aNETs are often incidental findings, rarely show metastases, and no chromosomal alterations are known.

Conference: 13th Annual ENETSConcerence (2016)

Presenting Author: Sipos B

Authors: Nann D, Nieser M, Sperveslage J, Henopp T, Vokuhl C,

Keywords: NET,

#1202 Role of Amplifications in the PIK3/Akt/mTOR-Pathway in Neuroendocrine Tumors of the Small Intestine

Introduction: Amplifications in the PIK3/Akt/mTOR pathway can lead to increased proliferation and reduced apoptosis, resulting in the development of various cancers. Recently, amplifications of Akt1/2, PDGFRα/β and mTOR in small intestine neuroendocrine tumors (siNET) have been shown.

Conference: 12th Annual ENETSConcerence (2015)

Presenting Author:

Authors: Hoffmeister M, Sperveslage J, Anlauf M, Petersen K, Gress T,

Keywords: NET, gene amplification, mTOR pathway,

#730 Loss of Chromosome 18 in Neuroendocrine Tumors of the Midgut

Introduction: The genetic alterations in neuroendocrine tumors (NET) of the midgut, in particular of the appendix (aNET), are poorly characterized. The most frequent chromosomal aberration in ileal NET (iNET) is the loss of one chromosome 18. The relevance of this alteration is unclear.

Conference: 10th Annual ENETSConcerence (2013)

Presenting Author:

Authors: Henopp T, Brix J, Sperveslage J, Anlauf M, Petersen K,

Keywords: chr18,

#700 Comparative Expression Analysis of Chromosome 18 Related miRNAs in Ileal NET with and without Chr18 Loss

Introduction: MicroRNAs (miRs) play important roles in many kinds of biological processes. Because the (partial) loss of one chromosome 18 (Chr18) is a frequent event in ileal NETs (iNETs), we assessed the potential deregulation of miR-expression in these patients.

Conference: 10th Annual ENETSConcerence (2013)

Presenting Author: Sperveslage J

Authors: Hoffmeister M, Sperveslage J, Henopp T, Anlauf M, Petersen K,

Keywords: NET, mir-expression,

#565 Proliferative Activity is Not Associated with Tumor Aggressiveness in Ileal Neuroendocrine Tumors

Introduction: The accuracy of the new WHO grading system for neuroendocrine neoplasms has not yet been validated for ileal neuroendocrine tumors (iNETs).

Conference: 9th Annual ENETSConcerence (2012)

Presenting Author:

Authors: Henopp T, Sperveslage J, Anlauf M, Klöppel G, Neumayer B,

Keywords: ileal NET, proliferation, prognosis,