90Y- and/or 177Lu-DOTATOC Re-Challenge in Patients with Progressive Neuroendocrine Tumors Abstract #2962

Introduction: Most patients treated with PRRT will eventually progress. Previous studies indicated that repeated PRRT is feasible and promising.
Aim(s): To assess the efficacy of the first and second re-challenge therapy of 90Y- and/or 177Lu-DOTATOC peptide receptor-targeted radionuclide therapy (PRRT) in patients with grade 1 or 2 neuroendocrine tumors (NET).
Materials and methods: In this single center retrospective analysis, patients with grade 1 or 2 recurrent or progressive inoperable bronchial or gastroenteropancreatic NET who were admitted for re-challenge 90Y- and/or 177Lu-DOTATOC were analyzed. Re-challenge PRRT was defined as subsequent treatment after initial PRRT (repeated referral to PRRT). The time interval between treatments served as surrogate endpoint for time to progression. For re-challenge PRRT, patients underwent one 90Y-and/or 1-2 177Lu-DOTATOC treatment cycles.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: Dr. med. Susanne Aberle

To read results and conclusion, please login ...

Further abstracts you may be interested in

#2694 The Incidence of Gastrointestinal Neuroendocrine Tumors in the Russian Population
Introduction: Over the past four decades, the incidence of neuroendocrine tumors (NETs) has increased. The limited choice of treatments, broad clinical variability of the syndrome explains the increased interest in NETs.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Epidemiology/Natural history/Prognosis - Registries, nationwide and regional surveys
Presenting Author: Alina Isiangulova
#2706 A New Possibility in SI-NET Surgery by Using a New β- Probe and 90Y-DOTATOC: A Pilot Study
Introduction: In neuroendocrine tumor (NET), complete surgery could better the prognosis of this disease: radioguided surgery (RGS) with beta-radioisotopes, as 90Y, is a novel approach focused on developing a new probe which, detecting electrons and operating with low background, provides a clearer delineation of the margins of lesions with low radiation exposition for surgeons.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Surgical treatment and Ablative Therapies
Presenting Author: Dr Chiara Maria Grana
#2723 Achieving Objective Response in Treatment of Non-Resectable Neuroendocrine Tumors Does Not Predict Longer Time to Progression Compared to Achieving Stable Disease
Introduction: There are several treatment modalities for unresectable neuroendocrine tumors. Traditionally the goal of these treatments are to reduce the tumor load; objective response (OR). Less emphasis has been put on inducing the tumors to stop growing without reduction in total tumor load; stable disease (SD).
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Medical treatment - others, not specified
Presenting Author: MD Espen Thiis-Evensen
Authors: Thiis-Evensen E, Sponheim J, ...
#2731 177Lu-DOTATATE Plus 166Ho-Radioembolization in Patients with Neuroendocrine Tumours; A Single Center, Prospective, Interventional, Non-Comparative, Open Label, Phase II Study (HEPAR PLuS Study)
Introduction: The liver is the most commonly affected organ in metastatic neuroendocrine disease and is the most incriminating factor for patient survival. Additional treatment of liver disease with radioembolization may improve outcome in NET patients with bulky residual liver disease after PRRT.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: M.D. Ph.D. Arthur Braat
Authors: Braat A, Rutger B, Van Rooij R, Braat M, ...
#2777 Tumor-to-Liver Ratio of Ga-68-DOTATOC PET/CT as a Prognostic Parameter in Metastatic, Well-Differentiated Gastroenteropancreatic-Neuroendocrine Tumor Patients Who Received Lanreotide Therapy
Introduction: Lanreotide is a long-acting somatostatin analogue with proven antitumor effect against metastatic, well-differentiated gastroenteropancreatic-neuroendocrine tumors (GEP-NETs). Ga-68-DOTATOC PET/CT is a sensitive imaging technique for NETs by targeting somatostatin receptors.
Conference: 17th Annual ENETS Conference 2020 (2020)
Category: Nuclear Medicine - Imaging and Therapy (PRRT)
Presenting Author: Yong-Il Kim
Authors: Kim Y I, Yoo C, Ryoo B Y, Ryu J S, ...