Optimizing Somatostatin Receptor Imaging in Patients With Neuroendocrine Tumors: The Impact of 99mTc-HYNICTOC SPECT/SPECT/CT Versus 68Ga-DOTATATE PET/CT Upon Clinical Management

Clinical Nuclear Medicine
Jolanta KunikowskaLeszek Krolicki

Abstract

The presence of somatostatin receptors in neuroendocrine tumors allows visualization with radiolabeled somatostatin analogs in vivo. The aim of this prospective study was to compare somatostatin receptor imaging using Tc-HYNICTOC with Ga-DOTATATE (DOTA-DPhe1,Tyr3-octreotate) with respect to sensitivity, specificity, and impact upon clinical decision making. Sixty-eight patients (30 men, 38 women; aged 56.4 ± 13.5 years) with disseminated, histologically proven neuroendocrine tumor were enrolled. All patients with previous Tc-HYNICTOC (Tektrotyd; POLATOM, Otwock, Poland) underwent Ga-DOTATATE PET/CT. Both examinations were compared on a per-patient and per-lesion basis. The sensitivity, specificity, positive and negative predictive values, and accuracy of Ga-DOTATATE and Tc-HYNICTOC were 100% versus 82%, 85% versus 69%, 97% versus 92%, 100% versus 47%, and 97% versus 79%, respectively.Concordant results were observed in 58 patients (49/68 positive on both Ga-DOTATATE and Tc-HYNICTOC and 9/68 negative in both examinations). Ten of 68 patients had Ga-DOTATATE-positive, Tc-HYNICTOC-negative studies. Two hundred eighteen lesions were detected using Tc-HYNICTOC, compared with 546 lesions using Ga-DOTATATE (P < 0.0001). Ga-DOTATATE de...Continue Reading

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Citations

Jan 8, 2019·Endocrine-related Cancer·Aura D Herrera-MartínezRichard A Feelders
Mar 5, 2019·Nuclear Medicine and Molecular Imaging·Humayun BashirM Rehan Gul
Jun 2, 2020·Nuclear Medicine and Biology·Adriano Duatti
Feb 16, 2021·European Journal of Cancer : Official Journal for European Organization for Research and Treatment of Cancer (EORTC) [and] European Association for Cancer Research (EACR)·Valentina AmbrosiniJames Yao

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