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Published in: European Journal of Nuclear Medicine and Molecular Imaging 1/2012

01-01-2012 | Original Article

Comparison of 18F-dopa PET/CT and 123I-MIBG scintigraphy in stage 3 and 4 neuroblastoma: a pilot study

Authors: Arnoldo Piccardo, Egesta Lopci, Massimo Conte, Alberto Garaventa, Luca Foppiani, Vania Altrinetti, Cristina Nanni, Pietro Bianchi, Angela Cistaro, Stefania Sorrentino, Manlio Cabria, Andrea Pession, Matteo Puntoni, Giampiero Villavecchia, Stefano Fanti

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 1/2012

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Abstract

Purpose

18F-Dopa positron emission tomography (PET)/CT has proved a valuable tool for the assessment of neuroendocrine tumours. So far no data are available on 18F-dopa utilization in neuroblastoma (NB). Our aim was to evaluate the role of 18F-dopa PET/CT in NB and compare its diagnostic value with that of 123I-metaiodobenzylguanidine (MIBG) scintigraphy in patients affected by stage 3–4 NB.

Methods

We prospectively evaluated 28 paired 123I-MIBG and 18F-dopa PET/CT scans in 19 patients: 4 at the time of the NB diagnosis and 15 when NB relapse was suspected. For both imaging modalities we performed a scan-based and a lesion-based analysis and calculated sensitivity, specificity and accuracy. The standard of reference was based on clinical, imaging and histological data.

Results

NB localizations were confirmed in 17 of 19 patients. 18F-Dopa PET/CT and 123I-MIBG scintigraphy properly detected disease in 16 (94%) and 11 (65%), respectively. On scan-based analysis, 18F-dopa PET/CT showed a sensitivity and accuracy of 95 and 96%, respectively, while 123I-MIBG scanning showed a sensitivity and accuracy of 68 and 64%, respectively (p < 0.05). No significant difference in terms of specificity was found. In 9 of 28 paired scans (32%) PET/CT results influenced the patient management. We identified 156 NB localizations, 141 of which were correctly detected by 18F-dopa PET/CT and 88 by MIBG. On lesion-based analysis, 18F-dopa PET/CT showed a sensitivity and accuracy of 90% whereas 123I-MIBG scintigraphy showed a sensitivity and accuracy of 56 and 57%, respectively (p < 0.001). No significant difference in terms of specificity was found.

Conclusion

In our NB population 18F-dopa PET/CT displayed higher overall accuracy than 123I-MIBG scintigraphy. Consequently, we suggest 18F-dopa PET/CT as a new opportunity for NB assessment.
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Metadata
Title
Comparison of 18F-dopa PET/CT and 123I-MIBG scintigraphy in stage 3 and 4 neuroblastoma: a pilot study
Authors
Arnoldo Piccardo
Egesta Lopci
Massimo Conte
Alberto Garaventa
Luca Foppiani
Vania Altrinetti
Cristina Nanni
Pietro Bianchi
Angela Cistaro
Stefania Sorrentino
Manlio Cabria
Andrea Pession
Matteo Puntoni
Giampiero Villavecchia
Stefano Fanti
Publication date
01-01-2012
Publisher
Springer-Verlag
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 1/2012
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-011-1938-2

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