Abstract Library

#4642 Establishing a standardised histopathological grading system for mesenteric fibrosis in small intestinal neuroendocrine tumours

Introduction: Mesenteric fibrosis (MF) frequently develops around mesenteric metastasis in small intestinal neuroendocrine tumour (SI-NET) patients. Since MF is not always detected radiologically, histopathological examination is considered the gold standard. However, there is no uniform histopathological scoring system for MF correlated with clinical data.

Conference:

Presenting Author:

Authors: van der Slik E, Feelders R, Hofland L, Hall A, Iyer A,

Keywords: small intestinal neuroendocrine tumour, mesenteric fibrosis, grading system,

#4629 Identification of putative master regulators in pancreatic neuroendocrine tumours using gene expression data and network inference

Introduction: Pancreatic neuroendocrine tumours (pNETs) are a heterogenous group of pancreatic malignancies with a unique biology and pathophysiology. Tumour grade and extension are commonly used for prognostic determination. Current pathologic grading system needs regular updates to refine prognostic classification. Genomic screening may provide more objective classes and reflect tumour biology.

Conference:

Presenting Author: Jannin A

Authors: Jannin A, Elati M, Do Cao C, Figeac M, Leteurtre E,

Keywords: pancreatic neuroendocrine tumour, RNA-Seq, Master regulators, MEN1,

#4549 Alpha-Fetoprotein as a valuable biomarker in neuroendocrine tumours

Introduction: Neuroendocrine tumours (NETs) are a rare group of tumours that pose a significant diagnostic, therapeutic, and prognostic challenge. This complexity arises from the diversity and heterogeneity of these neoplasms, as well as from the limitations of commonly used biomarkers in clinical practice. Alpha-fetoprotein (AFP) is a fetal protein widely used primarily for congenital defects in prenatal diagnostics and in certain malignancies in adults.

Conference:

Presenting Author:

Authors: Musiałkiewicz J, Gut P, Komarnicki P, Maciejewski A, Ruchała M,

Keywords: alpha-fetoprotein, biomarker, neuroendocrine tumour,

#4460 Digestive neuroendocrine tumours G1 and G2: Experience of the medical oncology department at the Oran University Hospital Establishment 1st November 1954

Introduction: The histological classification of neuroendocrine tumours (NETs) remains complex, and their grading is a major prognostic factor, essential for guiding appropriate management. Moreover, NETs raise unresolved histogenetic questions. The treatment of grade 1 (G1) NETs primarily relies on somatostatin analogues, while grade 2 (G2) NETs, being more heterogeneous, may require management that includes chemotherapy or targeted therapy.

Conference:

Presenting Author:

Authors: Kehili H, Bengueddache A, Boumansour N, Larbi Bounsbia L, Bechikh A,

Keywords: Digestive Neuroendocrine Tumour, Grade 1, Grade 2, Somatostatin Analogue,

#4403 Ki-67 index cut-off values and survival prognostication in neuroendocrine neoplasms: Machine learning-based insights

Introduction: The current grading system for gastroenteropancreatic neuroendocrine neoplasms (GEP-NEN) is based on Ki-67 index and/or mitotic rate. By definition, high-grade NEN (neuroendocrine tumour grade 3 [NET G3] and neuroendocrine carcinoma [NEC]) have a Ki-67 >20%, while NET G1 have a Ki-67

Conference:

Presenting Author:

Authors: Melhorn P, Berchtold L, Mazal P, Raderer M, Kiesewetter B,

Keywords: neuroendocrine neoplasm, prognosis, ki-67 index,