Abstract Library

#4448 Statins and somatostatin analogues in gastroenteropancreatic neuroendocrine tumours (GEP-NET): Impact on overall survival

Introduction: Gastroenteropancreatic neuroendocrine tumours (GEP-NET) are rare neoplasia with unclear risk factor influencing their development and survival. Statins appear to enhance antiproliferative effect of some chemotherapies in other cancers, but their effect in GEP-NET treated with somatostatin analogues (SSA) are largely unknown.

Conference:

Presenting Author: Benevento E

Authors: Benevento E, Liccardi A, Minotta R, Cannavale G, Di Iasi G,

Keywords: statins, neuroendocrine tumour, gastroenteropancreatic, overall survival, somatostatin analogue,

#4119 Interim analysis of LANTana: Phase Ib study investigating up-regulation of somatostatin receptor-2 (SSTR2) with the de-methylating agent ASTX727 to allow [177Lu]Lu-DOTA-TATE in metastatic neuroendocrine tumors (NETs)

Introduction: To be suitable for [177Lu]Lu-DOTA-TATE, SSTR2 must be present on tumor surface as per positive uptake on [68Ga]Ga-DOTA-TATE-PET/CT. SSTR2 promoter methylation reduces SSTR2 expression; this can be reversed using a demethylating agent.

Conference:

Presenting Author:

Authors: Rzeniewicz K, Ward C, Khan S, Naik M, Qurashi M,

Keywords: neuroendocrine tumor, peptide receptor radionucleotide therapy, methylation, [68Ga]Ga-DOTA-peptide-PET, [177Lu]Lu-DOTA-TATE,

#3974 Small extracellular vesicles miR-183-5p derived from highly invasive pancreatic neuroendocrine tumors reprogram macrophages towards SPP1+ macrophages

Introduction: Highly-metastatic (HM) pancreatic neuroendocrine tumors (pNETs) are characterized by an early occurrence of lymph node and liver metastases and a poor prognosis. Single-cell sequencing analysis showed that HM pNETs had remarkable infiltration of SPP1+ macrophages, which were involved in cell migration, angiogenesis and small extracellular vesicles (sEVs).

Conference:

Presenting Author:

Authors: Zhang W, Xu J, Lou X, Qin Y, Chen J,

Keywords: pancreatic neuroendocrine tumor, p53, small extracellular vesicles, macrophages, SPP1, biomarker,

#3963 Infrastructure FOr Rare Cancer in the NEtherlands, towards a comprehensive platform for early detection and diagnosis of rare cancers (FORCE), and especially neuroendocrine neoplasms (NEN)

Introduction: NEN consist of a heterogeneous group of rare tumors. For these patients, clinical trials requiring a high number of patients are often infeasible. Often, the prognosis is poor due to late diagnosis and fewer available treatment options as compared to patients with common cancer types. In common cancers, ultrasensitive molecular profiling of circulating cell-free DNA (USccfDNA) based tests are promising to improve diagnosis, detection of minimal residual disease (MRD), and recurrence. Data needed to apply USccfDNA in NEN is lacking.

Conference:

Presenting Author:

Authors: de Hosson L, Pieterman C, Fehrmann R, de Herder W, Jalving M,

Keywords: circulating cell free DNA, biobank, databank, early detection,

#3932 Artisan: Prospective phase II trial of TheraSphere Selective Internal Radiation Therapy (SIRT) for liver metastases in neuroendocrine tumors (NETs)

Introduction: The liver is the commonest site of metastases and is an independent predictor of poor outcome. SIRT allows delivery of high dose radiation to liver metastases and has shown promise in the management of NETs. We determined the safety and efficacy of SIRT in those with inoperable liver metastases in a prospective study.

Conference:

Presenting Author: Ahmed Q

Authors: Ahmed Q, Doumanoglou N, Evans J, Martinez M, Ward C,

Keywords: radioembolization, carcinoid, neuroendocrine, metastases,