Abstract Library

#2991 Gastroenteropancreatic (GEP) Neuroendocrine Neoplasia G3 (NEN G3) According to 2019 WHO Classification: A Comprehensive Clinicopathological Characterization Including Mismatch Repair (MMR) Proteins, PDL1 Expression and KRAS/BRAF Status

Introduction: In the 2019 WHO FOR NEN’S classification NETG3 have been distinguished from poorly differentiated neuroendocrine carcinoma (NEC). They are heterogeneous group concerning prognosis and treatment benefit.

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Ruiz G, Graselli J, Golubicki M, Rizzol M,

Keywords: G3 NEN, PD-L1, KRAS, BIOMARKERS,

#2037 Stromal Immune Contexture Predicts Disease-Free Survival in Gastro-Entero-Pancreatic Neuroendocrine Neoplasms (GEP-NENs)

Introduction: Stromal Immune Contexture (SIC) helps predict prognosis in solid Tumors (T) but has been poorly investigated in gastro-entero-pancreatic neuroendocrine neoplasms (GEP-NENs). We tested whether GEP-NENs profiling for adaptive immunity-related SIC markers, as well as inflammatory (COX2),EMT [Beta-catenin (B-cat)] and oncogenic pathway signaling (pS6) markers,could improve Ki67 and/or MO-based prediction of OS and DFS.

Conference: 15th Annual ENETSConcerence (2018)

Presenting Author: Milione M

Authors: Milione M, Miceli R, Pellegrinelli A, Spaggiari P, Tagliabue G,

Keywords: Neuroendocrine, Ki-67, Morphology, Immune contexture, PDL1, Beta-Catenin,

#1864 Analysis of mTOR, CXCR4 and PD-1 Checkpoint Pathways in Merkel Cell Neuroendocrine Carcinomas: Correlations with Prognosis and Viral Status

Introduction: Merkel cell carcinoma (MCC) is a rare and aggressive cutaneous neuroendocrine tumor. Prognostic factors currently included in the reference AJCC classification are mainly clinical.

Conference: 14th Annual ENETSConcerence (2017)

Presenting Author:

Authors: Benhamou J, Deschamps L, Vergier B, Pham-Ledard A, Carlotti A,

Keywords: Merkel cell carcinoma, mTor, CXCR4, PD-L1,

#1561 PD1 and PDL1 Expression in Midgut Neuroendocrine Tumors

Introduction: PD1/PDL1 inhibitors have shown promising results in different carcinomas, and correlation between PDL1 expression and response to immunotherapy has been reported. No studies thus far have investigated the expression of PD1 or PDL1 in midgut NETs.

Conference: 13th Annual ENETSConcerence (2016)

Presenting Author:

Authors: Cives M, Strosberg J, Coppola D,

Keywords: midgut NETs, PD1, PD-L1, lymph node-like structures,

#1448 Distribution of T-Cell Infiltrate in G1, G2 and G3 NENs

Introduction: The identification of T-cell infiltrate and the expression of inhibitory molecules in the tumor microenvironment could lend support to the use of immunotherapy in the treatment of gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs).

Conference: 13th Annual ENETSConcerence (2016)

Presenting Author: Milione M

Authors: Milione M, Pellegrinelli A, Centonze G, Dominoni F, Pusceddu S,

Keywords: Ki-67, T-cells, NEN,