64Cu-DOTATATE PET for Neuroendocrine Tumors: A Prospective Head-to-Head Comparison with 111In-DTPA-Octreotide in 112 Patients

Andreas Pfeifer, Ulrich Knigge, Tina Binderup, Jann Mortensen, Peter Oturai, Annika Loft, Anne Kiil Berthelsen, Seppo W Langer, Palle Rasmussen, Dennis Elema, Eric von Benzon, Liselotte Højgaard, Andreas Kjaer

55 Citations (Scopus)

Abstract

Neuroendocrine tumors (NETs) can be visualized using radiolabeled somatostatin analogs. We have previously shown the clinical potential of 64Cu-DOTATATE in a small first-in-human feasibility study. The aim of the present study was, in a larger prospective design, to compare on a head-to-head basis the performance of 64Cu-DOTATATE and 111In-diethylenetriaminepentaacetic acid (DTPA)-octreotide (111In-DTPA-OC) as a basis for implementing 64Cu-DOTATATE as a routine. Methods: We prospectively enrolled 112 patients with pathologically confirmed NETs of gastroenteropancreatic or pulmonary origin. All patients underwent both PET/CT with 64Cu-DOTATATE and SPECT/CT with 111In-DTPA-OC within 60 d. PET scans were acquired 1 h after injection of 202 MBq (range, 183-232 MBq) of 64Cu-DOTATATE after a diagnostic contrast-enhanced CT scan. Patients were followed for 42-60 mo for evaluation of discrepant imaging findings. The McNemar test was used to compare the diagnostic performance. Results: Eightyseven patients were congruently PET-and SPECT-positive. No SPECT-positive cases were PET-negative, whereas 10 false-negative SPECT cases were identified using PET. The diagnostic sensitivity and accuracy of 64Cu-DOTATATE (97% for both) were significantly better than those of 111In-DTPA-OC (87% and 88%, respectively, P 5 0.017). In 84 patients (75%), 64Cu-DOTATATE identified more lesions than 111In-DTPA-OC and always at least as many. In total, twice as many lesions were detected with 64Cu-DOTATATE than with 111In-DTPA-OC. Moreover, in 40 of 112 cases (36%) lesions were detected by 64Cu-DOTATATE in organs not identified as disease-involved by 111In-DTPA-OC. Conclusion: With these results, we demonstrate that 64Cu-DOTATATE is far superior to 111In-DTPAOC in diagnostic performance in NET patients. Therefore, we do not hesitate to recommend implementation of 64Cu-DOTATATE as a replacement for 111In-DTPA-OC.

Original languageEnglish
JournalJournal of Nuclear Medicine
Volume56
Issue number6
Pages (from-to)847-54
Number of pages8
ISSN0161-5505
DOIs
Publication statusPublished - 1 Jun 2015

Keywords

  • Adult
  • Aged
  • Aged, 80 and over
  • Biopsy
  • Female
  • Humans
  • Image Processing, Computer-Assisted
  • Male
  • Middle Aged
  • Multimodal Imaging
  • Neoplasm Metastasis
  • Neuroendocrine Tumors
  • Octreotide
  • Organometallic Compounds
  • Pentetic Acid
  • Positron-Emission Tomography
  • Prospective Studies
  • Receptors, Somatostatin
  • Stomach Neoplasms
  • Tomography, Emission-Computed, Single-Photon
  • Tomography, X-Ray Computed

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