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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 3/2016

01.03.2016 | Original Article

Molecular response assessed by 68Ga-DOTANOC and survival after 90Y microsphere therapy in patients with liver metastases from neuroendocrine tumours

verfasst von: Luca Filippi, Francesco Scopinaro, Giuseppe Pelle, Roberto Cianni, Rita Salvatori, Orazio Schillaci, Oreste Bagni

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 3/2016

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Abstract

Purpose

We investigated the prognostic role of 68Ga-DOTANOC in patients affected by hepatic metastases from neuroendocrine tumours (NET) undergoing 90Y radioembolization (90Y-RE).

Methods

A group of 15 consecutive patients with unresectable NET liver metastases underwent 68Ga-DOTANOC PET at baseline and 6 weeks after 90Y-RE. Molecular response was defined as a reduction of >50 % in the tumour-to-spleen ratio (ΔT/S). The patients were divided into two groups (responders with ΔT/S >50 % and nonresponders with ΔT/S <50 %) Patients were followed up by imaging and laboratory tests every 3 months until death or for at least 36 months following 90Y-RE. Statistical analysis was performed to identify factors predicting overall survival (OS) and progression-free survival (PFS).

Results

A decrease in T/S ratio was seen in all patients on 68Ga-DOTANOC PET scans performed after 90Y-RE. Nine patients were classified as responders and six as nonresponders. The mean OS in all patients was 31.0 months. Responders had a significantly (p < 0.001) longer OS (mean 36.0 ± 2.5 months) and PFS (mean 29.7 ± 3.4 months) than nonresponders. In a multivariate analysis, none of the other examined variables including age, unilobar vs. bilobar locations, bilirubin levels, radiological response or the presence of extrahepatic disease significantly predicted patient outcome.

Conclusion

Molecular response assessed with 68Ga-DOTANOC PET might be a useful predictor of survival in patients affected by NET liver metastases treated with 90Y-RE.
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Metadaten
Titel
Molecular response assessed by 68Ga-DOTANOC and survival after 90Y microsphere therapy in patients with liver metastases from neuroendocrine tumours
verfasst von
Luca Filippi
Francesco Scopinaro
Giuseppe Pelle
Roberto Cianni
Rita Salvatori
Orazio Schillaci
Oreste Bagni
Publikationsdatum
01.03.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 3/2016
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-015-3178-3

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