Abstract Library

#4638 Prognostic role of the kynurenine/tryptophan pathway and inflammatory cytokines in neuroendocrine tumour progression: A cross-sectional analysis

Introduction: Indoleamine-2,3-dioxygenase (IDO) converts L-tryptophan (T) to L-kynurenine (K) resulting in an immunosuppressive microenvironment.

Conference:

Presenting Author: Mancini C

Authors: Mancini C, Pecora G, Salerno G, Lionetto L, Visco V,

Keywords: Neuroendocrine Tumour, tryptophan, kynurenine, cytokines, immunotherapy, Indoleamine-2-3-dioxygenase,

#4383 Clinical and biological heterogeneity of grade 2 gastroenteropancreatic neuroendocrine neoplasms (GEP NENs): Prognostic significance of the 10% Ki-67 index cutoff and implications for treatment strategies

Introduction: Gastroenteropancreatic neuroendocrine neoplasms (GEP NENs) are a diverse group of neoplasms with varying prognoses. Grade 2 (G2) tumours, with a Ki-67 index between 3%-20%, present management challenges due to their intermediate behaviour, with evidence suggesting distinct outcomes between Ki-67

Conference:

Presenting Author: Massironi S

Authors: Massironi S, Coltro L, Gallo C, Preatoni P, Dell' Anna G,

Keywords: Neuroendocrine neoplasm, Ki-67 Index, Grade 2 Neuroendocrine Tumour, Neoplasm Grading, Tumour Heterogeneity, Progression-Free Survival (PFS), Peptide Receptor Radionuclide Therapy,

#4228 Evaluation of the impact of indoleamine 2,3-deoxygenase (IDO) enzyme activity in neuroendocrine tumors (NETs)

Introduction: Indoleamine 2,3-deoxygenase (IDO) enzyme, by inducing L-tryptophan (Trp) depletion and L-kynurenine (kyn) accumulation, contributes to the formation of an immunosuppressive microenvironment. Some studies highlighted that patient with cancer in treatment with immune checkpoint inhibitors (ICI) and with low Kyn/Trp values showed a better PFS and OS, but there are no data for NETs.

Conference:

Presenting Author: Mancini C

Authors: Mancini C, Mazzilli R, Zamponi V, Motta C, Salerno G,

Keywords: neuroendocrine tumor, IDO enzyme, Kyn/Trp ratio, immunotherapy,

#3883 Immune landscape in mixed neuroendocrine-non neuroendocrine neoplasms (MiNEN)

Introduction: A mixed neuroendocrine-non neuroendocrine neoplasm (MiNEN) is a novel defined rare entity, made up of two morphologically distinct neoplastic components; one neuroendocrine type (NEN), and the other one non-neuroendocrine type (nNEN). Neuroendocrine differentiation of tumors is thought to influence the tumor microenvironment (TME) through the secretion of various hormones or growth factors.

Conference:

Presenting Author:

Authors: Di Mauro A, Ferrara G, Iervolino D, Scognamiglio G, Clemente O,

Keywords: mixed neuroendocrine, neuroendocrine, tumor microenvironment, immunotherapy, biomarker,

#3872 Mixed neuroendocrine-non neuroendocrine neoplasms (MiNEN): Characterization of the genomic and pathological profile

Introduction: MiNENs is a novel defined rare entity, made up of two morphologically distinct neoplastic components; one neuroendocrine type (NEN), and the other one non-neuroendocrine type (nNEN). As available data are limited, the epidemiology and pathogenesis of MiNENs remain mostly unknown.

Conference:

Presenting Author:

Authors: Di Mauro A, Chianese U, Conte M, Benedetti R, Gerardo F,

Keywords: neuroendocrine, pathogenesis, mixed neuroendocrine, pathway, origin, molecular, molecular analysis, genomic profile,