Abstract Library

#2920 Mutation Spectrums Analysis of Colorectal Adenocarcinoma and Neuroendocrine Neoplasm Based on Same Genetic Background to Reveal Tumorigenesis

Introduction: The tumorigenesis of neuroendocrine neoplasm (NEN) are still ambiguous. The therapies of NENs in colon or rectum refer to adenocarcinomas (AC) when tumor metastasis, but the response was unsatisfactory which inspired us to explore the mutation difference.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Hu H

Authors: Cai W, Ge W, Wu D, Mao J, Hu H,

Keywords: Neuroendocrine neoplasm, Tumorigenesis, Mutation spectrums, Colorectal,

#2911 Pancreatic Neuroendocrine Neoplasms and GastroIntestinal Stromal Tumours: A Single-Institution Experience of a Rare Association and Review of the Literature

Introduction: Pancreatic neuroendocrine neoplasms (pNENs) and gastrointestinal stromal tumours (GISTs) are both rare neoplasms, and they have an estimated incidence of about 1/100,000 per year and about 1-1.5/100,000 per year, respectively.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Milanetto A, Pacciani S, Da Broi M, Gais Zürcher A, Fassan M,

Keywords: pancreatic neuroendocrine neoplasm, gastrointestinal stromal tumour, pancreatic surgery,

#2712 HORMONET: Study of Tamoxifen in Well Differentiated Neuroendocrine Tumors (NET) and Hormone Receptor Positive Expression

Introduction: We have shown immunohistochemistry (IHC) expression of estrogen (ER) and progesterone receptors (PR) in 20.8% and 18.8% of 96 NET patients (pts). An old clinical trial (Mortel C, 1984) suggested antitumor effects of estrogen/progesterone-directed therapies in NET. Yet the effects of an antiestrogen agent in NET pts whose tumor express ER and/or PR are unknown.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author: Riechelmann R

Authors: Riechelmann R, Donadio M, Felismino T, Fonseca de Jesus V, Mello C,

Keywords: neuroendocrine, estrogen, progesterone, clinical trial,

#2156 Two Cases Synchronous Atypical Parathyroid Adenomas and Papillary Thyroid Carcinoma

Introduction: A literature review revealed a prevalence of approximately 3% of nonmedullary thyroid cancer, which was found in patients operated on for primary hyperparathyroidism (pHPT). Papillary thyroid carcinomas(PTC) is a malignant epithelial tumour. PTC represent up to 87% of all thyroid carcinomas. Atypical parathyroid adenoma(APA) are a subset of parathyroid neoplasms that exhibit some of the features of parathyroid carcinoma but lack unequivocal invasive growth. APA represents about 0,5-4% of cases of pHPT. As a group, they may be considered tumors of uncertain malignant potential.

Conference: 15th Annual ENETSConcerence (2018)

Presenting Author:

Authors: Voronkova I, Mokrysheva N, Lapshina A, Gurevich L, Britvin T,

Keywords: papillary thyroid carcinomas, atypical parathyroid adenoma, primary hyperparathyroidism,

#1848 Liver Metastatic Disease (LMD) in Gastroenteropancreatic Neuroendocrine Tumors (GEP-NET): Incidence, Treatment and Survival in a Multicenter Study in Argentina. Preliminary Report. ARGENTUM GROUP

Introduction: The first observational Study from our Group in Argentina, showed 60% incidence of liver mets at initial diagnosis. The treatment encompasses a wide scope of surgical and non-surgical modalities.

Conference: 14th Annual ENETSConcerence (2017)

Presenting Author: O´Connor J

Authors: O'Connor J, Sanchez Loria F, Fauda M, Montal S, Podestá G,

Keywords: Liver, NETs,