Efficacy Of Utetium-177 Dotatate/Toc In Advanced Neuroendocrine Tumors

Objectives: The National Cancer Institute first elaborated 177Lu-DOTATATE/TOC in 2009. The purpose of this study was to prove the efficacy of these radiopeptides in the palliative treatment of patients with progressive advanced inoperable neuroendocrine tumors (NETs).Methods: A single-phase phase II open clinical trial was conducted in 13 adult patients with grade 1 y 2 NETs, with expression of somatostatin receptors in target lesions proven by Krenning Score 3 or 4 uptake in 99mTc-HResults: 13 patients (7 women) aged 63 +/- 11.6 years with inoperable advanced NETs were included. The final therapeutic administered activity was 800 mCi, 600 mCi, 400 mCi and 200 mCi in 4, 7, 1 and 1 patients, respectively. The disease control rate at 6 and 12 months was 69.2% and 45.5%, respectively, only obtaining stable disease. Six patients died, 2 of them in the first 6 months. Median overall survival was 15.7 months from the last treatment dose.Conclusions: The efficacy of the treatment with 177Lu-DOTATATE or 177Lu-DOTATOC radiopeptides elaborated in-house was confirmed, becoming a management alternative for patients with advanced NETs.