Abstract Library

#4497 Complex management of a long-term gastrinoma survivor with multimodal treatment approaches

Introduction: The prognosis of pancreatic gastrinomas is influenced by tumour burden, extent of metastasis, and treatment response, with 5-year survival rates ranging from 20% to 40%. Treatment for well-differentiated tumours typically include locoregional therapies, long-acting somatostatin analogues, molecular targeted agents, radionuclides, and chemotherapy.

Conference:

Presenting Author: Puscasu A

Authors: Puscasu A, Miron M, Croitoru A,

Keywords: gastrinoma, neuroendocrine tumour, long survival, complex management,

#4474 Follow-up 68Ga-DOTATATE PET/CT post resection of small bowel neuroendocrine neoplasia

Introduction: Surgery remains the mainstay of treatment for resectable neuroendocrine neoplasms (NENs). Post resection, guidelines suggest a risk-based approach to surveillance, with 3-6 monthly imaging based on tumour biology. However, there is a paucity of data regarding the timing of surveillance imaging for resected well-differentiated NEN.

Conference:

Presenting Author:

Authors: Sabahi Z, Chan D, Darbhamulla S, Mok C, Samra J,

Keywords: Neuroendocrine, 68Ga-DOTATATE PET/CT, Small bowel,

#4340 Predominant volumetric phenotype in dual PET and overall survival in NENs

Introduction: Dual 18F-FDG/68Ga-DOTATATE PET can predict NEN prognosis and guide treatment choice. However, research to date (such as the NEPTET score) has focused on the dual PET phenotype of single-point lesions rather than of the total disease volume.

Conference:

Presenting Author: Chan D

Authors: Chan D, Bernard E, Mokhtar S, Chou A, Gill A,

Keywords: Prognostic biomarker, PET/CT, tumour volume, 18F-FDG, 68Ga-DOTATATE,

#4339 Dual threshold contouring for [68Ga]DOTATATE PET and correlation with overall survival (OS) in patients with neuroendocrine neoplasia (NEN)

Introduction: Accurate contouring for [68Ga]DOTATATE PET in NEN is challenging due to differing physiological uptake for the liver, spleen and other organs. This poses a significant problem for absolute thresholding algorithms using a single threshold, even if the threshold is based on liver uptake (as suggested for FDG PET by PERCIST). Improved contouring of PET to measure [68Ga]DOTATATE-avid tumour volume could help clinical translation of this potential biomarker.

Conference:

Presenting Author: Chan D

Authors: Chan D, Mokhtar S, Bernard E, Diakos C, Sabahi Z,

Keywords: prognostic biomarker, PET imaging, [68Ga]DOTATATE, Total Lesion Volume,

#3610 C-X-C receptor 4 (CXCR4)-directed imaging and therapy in NEN patients with varying tumor aggressiveness – Diagnostic performance and eligibility for CXCR4-targeted theragnostics

Introduction: C-X-C motif chemokine receptor 4 (CXCR4) has emerged as a promising target in neuroendocrine neoplasms (NEN).

Conference:

Presenting Author: Weich A

Authors: Weich A, Schlötelburg W, Hartrampf P, Serfling S, Heinrich M,

Keywords: CXCR4, radioligand therapy, PET, theragnostics, imaging,