Abstract Library

#4650 Whole exome sequencing in pulmonary neuroendocrine neoplasms: Findings from a pilot investigation

Introduction: The molecular landscape of lung neuroendocrine tumours (NETs) is still poorly characterised. Lung NETs main prognostic factors currently include stage, histotype, grade, location, and demographic parameters, but molecular biomarkers are still not available, limiting the possibility for personalised therapeutic strategies.

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Presenting Author:

Authors: Martiradonna M, Pecora G, Mancini C, de Vitis C, Telese S,

Keywords: carcinoid, PBMC, NGS, Whole exome sequencing, WES, FFPE, Lung NET, molecular landscape,

#4560 Genetic trajectory and clonal evolution of non-functional pancreatic neuroendocrine tumours with lymph node and liver metastasis

Introduction: The systemic spread of panNETs is dominated by lymphatic reflux and portal system, exhibiting diverse patterns of metastasis without systematical genomic investigation.

Conference:

Presenting Author: Wu J

Authors: Wu J, Peng Y, Yin L, Jiang K, Li Q,

Keywords: Pan NET, Metastasis, Whole exome sequencing, Pylogenic tree,

#4174 Uncovering the genomic profiling of metastatic pheochromocytomas and paragangliomas: Leveraging plasma circulating tumor DNA for comprehensive genetic characterisation and monitoring

Introduction: Liquid biopsy, notably plasma circulating tumor DNA (ctDNA), is a non-invasive approach to elucidate the tumoral genomic profile from a blood sample. Pheochromocytomas and paragangliomas (PPGL) are often operated, characterized by quiet genomes and usually indolent tumor growth. However, challenges arise with metastatic tumors due to accessibility, catecholamine-related crises and surgery issues. Thus, molecular mechanisms transitioning from indolent to metastatic tumors are largely unexplored.

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Presenting Author:

Authors: Arenillas Lallana C, Moreno-Cárdenas A, Casteràs A, García-Álvarez A, Hernando J,

Keywords: liquid biopsy, ctDNA, metastasis, pheochromocytoma, paraganglioma, genomic targets,

#3964 Genomic profiling in the randomised controlled phase III COMPOSE trial of Lu-177 edotreotide for well-differentiated aggressive grade 2/3 gastroenteropancreatic-neuroendocrine tumors

Introduction: Targeted radiopharmaceutical therapy (RPT) has demonstrated potential in treatment of gastroenteropancreatic-neuroendocrine tumors (GEP-NETs). However, RPT exhibits variable outcomes and lacks tools to predict individual efficacy. To address the latter, a genomic profiling analysis was included in the randomised, controlled, open-label, phase III COMPOSE trial of Lu-177 edotreotide vs. best standard of care (CAPTEM, FOLFOX or everolimus) in patients with well differentiated, aggressive, G2/G3 somatostatin receptor-positive GEP-NETs.

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Presenting Author:

Authors: Srirajaskanthan R, Capdevila J, Halfdanarson T, Halperin D, Herrmann K,

Keywords: radiopharmaceutical therapy, genomic, Lu-177 edotreotide, gastroenteropancreatic, tumor, neuroendocrine,

#3935 Single-cell sequencing reveals the heterogeneity of pancreatic neuroendocrine tumors under the pattern of genomic instability and histological grading

Introduction: Non-functional pancreatic neuroendocrine tumor (NF-Pan-NET) is a kind of highly heterogeneous tumors. Histological grading is the key factors affecting the prognosis of patients and instructive in guiding treatment and assessing recurrence in NF-Pan-NET. 90% of NF-Pan-NET are grade G1 or G2, leading to an unpredictable clinical course that varies from indolent to highly malignant. Approximately one-third of patients without CNV alteration and the prognosis of these patients are better than that of patients with CNV alteration. Therefore, probing the heterogeneity of tumors based on histological grading and CNV variation is crucial.

Conference:

Presenting Author: Ye Z

Authors: Ye Z, Zhou C, Xu X, Chen J, Yu X,

Keywords: Pancreatic neuroendocrine tumor, single-cell sequencing, genomic instability, histological grading,