Abstract Library

#3880 Neoadjuvant peptide receptor radionuclide therapy (PRRT) with 90-Yttrium versus 177-Lutetium – Comparison of clinico-pathological and survival outcomes

Introduction: The role of peptide receptor radionuclide therapy (PRRT) as neoadjuvant treatment in patients with is still controversial, although recent experiences showed encouraging results in terms of oncological outcomes.

Conference:

Presenting Author: Genova L

Authors: Genova L, Andreasi V, Partelli S, Muffatti F, Battistella A,

Keywords: peptide receptor radionuclide therapy, prrt, neoadjuvant, surgery, yttrium, lutetium,

#3842 Long response to 177-Lu DOTATATE of a long malignant metastatic pheochromocytoma survivor

Introduction: A 64-year-old man was admitted on November 2010 with a CT-scan showing a 9cm right adrenal mass and high 24-hour urine metanephrins and cathecolamins. The mass was resected in December 2010 confirming a pT3N1 pheochromocytoma (PHEO). In May 2013 he presented a local recurrence that was resected proving metastatic lymphatic tissue. On May 2014 biochemical progression preceded a CT scan showing retroperitoneal lymphadenophaties with MIBG uptake. He was then treated with 131I-MIBG (two cycles) until May 2015, having biochemical and radiological response. After lymphatic tumor progression in January 2018, he received two more cycles of 131I-MIBG therapy (cumulative dose 800mCi) with proven refractory disease. He continued follow-up until two new abdominal masses appeared in October 2020. A high uptake in the 99Tc octreotide scintigraphy showed somatostatin receptors expression. The patient refused to participate in a clinical trial, so he was treated off-label with 177Lu-DOTATATE (800mCi) four doses from February to July 2021 achieving a near-complete response.

Conference:

Presenting Author: Martin Fernandez de Soignie A

Authors: Martin Fernandez de Soignie A, Martinez Moreno E, Antón-Pascual B, Pantin Gonzalez C, Sanchez Baños N,

Keywords: pheochromocytoma, 177-Lutetium,

#2753 Risk of PRRT-Associated Bowel Obstruction in Patients with Mesenteric/Peritoneal Disease and Potential Role of Corticosteroids in Treatment

Introduction: Although radiation-induced mesenteritis or peritonitis can potentially exacerbate risk of bowel obstruction, there are no data in the literature on incidence of intestinal obstruction related to peptide receptor radiotherapy (PRRT)

Conference: 17th Annual ENETSConcerence (2020)

Presenting Author:

Authors: Al-Toubah T, El-Haddad G, Pelle E, Strosberg J,

Keywords: PRRT, Lutetium-dotatate, Bowel obstruction, Peritoneal carcinomatosis, Steroids,

#2159 Hepatic Steatosis Secondary to Peptide Receptor Radionuclide Therapy with Somatostatin Analogue

Introduction: Peptide Receptor Radionuclide Therapy (PRRT) with 177-Lutetium-DOTA-TATE is a therapeutic modality for neuroendocrine tumors. It has some well known side effects, concerning specially the bone marrow (from cytopenias to myelodysplastic syndrome), in addition to mild renal effects. Hepatotoxicity from PRRT is still being studied.

Conference: 15th Annual ENETSConcerence (2018)

Presenting Author: Matheos de Lima B

Authors: Arruda Matheos de Lima B, Gonçalves R, Romano Gaspar P, Linhares Riello de Mello E, Oliveira Albagli R,

Keywords: peptide receptor radionuclide therapy, lutetium, collateral effects, hepatotoxicity, neuroendocrine tumor, hepatic steatosis,

#2120 One Year Experience with Lutetium-DOTATATE for Disseminated NETs in the Gregorio Marañon Hospital

Introduction: The main curative therapy for NET is surgical resection when the disease is localized. But high percentage of patients is diagnosed with advanced disseminated disease and the peptide receptor radionuclide therapy (PRRT) with somatostatin analogs (SSA) is an emerging effective treatment.

Conference: 15th Annual ENETSConcerence (2018)

Presenting Author: Picallo P

Authors: Picallo M, Percovich J, García Centeno R, Rotger A, Colon A,

Keywords: Neuroendocrine, Lutetium, Radionuclide therapy,