Abstract Library

#4282 A first-in-human phase I trial with antibody drug conjugate ADCT-701 in neuroendocrine tumours and carcinomas

Introduction: Neuroendocrine neoplasms (NENs) consist of neuroendocrine tumours and neuroendocrine carcinomas, which are rare malignancies found in various anatomical sites, including the gastrointestinal tract, pancreatic islets, lungs, and adrenal glands. Poorly differentiated NECs are classified as high-grade carcinomas that bear resemblance to small-cell lung cancer; however, these patients experience a high risk of relapse and demonstrate a limited response to additional systemic therapies. Adrenocortical carcinoma (ACC) is another rare cancer and currently, no targeted therapies have demonstrated significant effectiveness for this condition. Preclinical investigations have indicated that Delta-like non-canonical notch ligand 1 (DLK1) is expressed in various neuroendocrine neoplasms, including ACC, SCLC, neuroblastoma, pheochromocytoma, and paraganglioma.

Conference:

Presenting Author: Del Rivero J

Authors: Del Rivero J, Glod J, Magee T, Cooper K, Rivero A,

Keywords: NEN, NEC, NET, ACC, ADC, ADCT-701,

#4203 The diagnostic role of DWI-MRI for liver metastases of neuroendocrine neoplasms (NENs) in comparison with the functional imaging

Introduction: A combination of morphological and functional imaging plays a crucial role for diagnosis, staging and therapeutic decision for neuroendocrine neoplasms (NENs). Diffusion-weighted imaging (DWI) magnetic resonance imaging (MRI) is emerging as a key imaging technique in the NEN field.

Conference:

Presenting Author: Sesti F

Authors: Feola T, Sesti F, Centello R, Filice A, Pirisino R,

Keywords: MRI, DWI, PET, Liver metastases,

#4130 CHGA and DAXX/ATRX expression influence the outcome of pancreatic head neuroendocrine tumors

Introduction: In the past two years a difference between pancreatic neuroendocrine tumors (pNET) located in the head and body/tail regarding biological characteristics and clinical outcomes was described.

Conference:

Presenting Author: Amin T

Authors: Amin T, Viol F, Awwad F, Fründt T, Fraune C,

Keywords: neuroendocrine tumor, pancreatic, DAXX/ATRX, OS,

#4124 Evaluating a possible association between promoter methylation level of genes encoding catecholamine metabolizing enzymes and metanephrine secretion in pheochromocytoma and paraganglioma

Introduction: Paragangliomas (PPGLs) are rare neuroendocrine tumors that may secrete catecholamines and their metabolites (metanephrines [MN], normetanephrine [NMN]). Secretion patterns differ by adrenal/extra-adrenal origin and genetic alteration. Catecholamines synthesis is carried by phenylalanine hydroxylase (PAH), tyrosine hydroxylase (TH), aromaticL-aminoacid decarboxylase (AADC), dopamine β-hydroxylase (DBH) and phenylethanolamine N-methyltransferase (PNMT). However, their regulation in PPGL is not entirely understood.

Conference:

Presenting Author: Tirosh A

Authors: Kaplinsky A, Halperin R, Shlomai G, Tirosh A,

Keywords: ppgl, methylation, catecholamine, pseudohypokia, metanephrine, kinase signaling, pheochromocytoma, paraganglioima,

#3921 Mixed neuroendocrine-non-neuroendocrine neoplasms of the rectum: A case report

Introduction: Mixed Neuroendocrine-Non-Neuroendocrine Neoplasms (MiNEN) represent roughly 1-2% of all colorectal malignancies. Given the rareness and heterogeneity of these mixed tumors, recognition and accurate diagnosis remain a challenge. In the absence of established guidelines, they are treated according to the standard of care for pure neuroendocrine carcinomas or adenocarcinomas from similar sites of origin.

Conference:

Presenting Author: Verdasca F

Authors: Verdasca F, Montenegro A, Mendes J, Furtado I, Ferreira R,

Keywords: mixed neuroendocrine-non-neuroendocrine neoplasms, mixed epithelial endocrine neoplasms, case report, colorectal cancer,