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European Journal of Nuclear Medicine and Molecular Imaging

Erschienen in:

01.09.2011 | Original Article

¹²³I-MIBG scintigraphy/SPECT versus ¹⁸F-FDG PET in paediatric neuroblastoma

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 9/2011

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Abstract

Purpose

To analyse different uptake patterns in ¹²³I-MIBG scintigraphy/SPECT imaging and ¹⁸F-FDG PET in paediatric neuroblastoma patients.

Methods

We compared 23 ¹²³I-MIBG scintigraphy scans and 23 ¹⁸F-FDG PET scans (mean interval 10 days) in 19 patients with a suspected neuroblastic tumour (16 neuroblastoma, 1 ganglioneuroblastoma, 1 ganglioneuroma and 1 opsomyoclonus syndrome). SPECT images of the abdomen or other tumour-affected regions were available in all patients. Indications for ¹⁸F-FDG PET were a ¹²³I-MIBG-negative tumour, a discrepancy in ¹²³I-MIBG uptake compared to the morphological imaging or imaging results inconsistent with clinical findings. A lesion was found by ¹²³I-MIBG scintigraphy and/or ¹⁸F-FDG PET and/or morphological imaging.

Results

A total of 58 suspicious lesions (mean lesion diameter 3.8 cm) were evaluated and 18 were confirmed by histology and 40 by clinical follow-up. The sensitivities of ¹²³I-MIBG scintigraphy and ¹⁸F-FDG PET were 50% and 78% and the specificities were 75% and 92%, respectively. False-positive results (three ¹²³I-MIBG scintigraphy, one ¹⁸F-FDG PET) were due to physiological uptake or posttherapy changes. False-negative results (23 ¹²³I-MIBG scintigraphy, 10 ¹⁸F-FDG PET) were due to low uptake and small lesion size. Combined ¹²³I-MIBG scintigraphy/¹⁸F-FDG PET imaging showed the highest sensitivity of 85%. In 34 lesions the ¹²³I-MIBG scintigraphy and morphological imaging findings were discrepant. ¹⁸F-FDG PET correctly identified 32 of the discrepant findings. Two bone/bone marrow metastases were missed by ¹⁸F-FDG PET.

Conclusion

¹²³I-MIBG scintigraphy and ¹⁸F-FDG PET showed noticeable differences in their uptake patterns. ¹⁸F-FDG PET was more sensitive and specific for the detection of neuroblastoma lesions. Our findings suggest that a ¹⁸F-FDG PET scan may be useful in the event of discrepant or inconclusive findings on ¹²³I-MIBG scintigraphy/SPECT and morphological imaging.

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Titel: 123I-MIBG scintigraphy/SPECT versus 18F-FDG PET in paediatric neuroblastoma
Publikationsdatum: 01.09.2011
Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 9/2011
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI: https://doi.org/10.1007/s00259-011-1843-8

Springer Medizin

Abstract

Purpose

Methods

Results

Conclusion

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