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Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging 6/2020

01.06.2020 | Original Article

Succinate detection using in vivo 1H-MR spectroscopy identifies germline and somatic SDHx mutations in paragangliomas

verfasst von: Charlotte Lussey-Lepoutre, Alexandre Bellucci, Nelly Burnichon, Laurence Amar, Alexandre Buffet, Tom Drossart, Sébastien Fontaine, Olivier Clement, Paule Benit, Pierre Rustin, Lionel Groussin, Tchao Meatchi, Anne-Paule Gimenez-Roqueplo, Bertrand Tavitian, Judith Favier

Erschienen in: European Journal of Nuclear Medicine and Molecular Imaging | Ausgabe 6/2020

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Abstract

Purpose

Germline mutations in genes encoding succinate dehydrogenase (SDH) are frequent in patients with pheochromocytoma and paraganglioma (PPGL). They lead to SDH inactivation, mediating a massive accumulation of succinate, which constitutes a highly specific biomarker of SDHx-mutated tumors when measured in vitro. In a recent pilot study, we showed that magnetic resonance spectroscopy (1H-MRS) optimized for succinate detection (SUCCES) could detect succinate in vivo in both allografted mouse models and PPGL patients. The objective of this study was to prospectively assess the diagnostic performances of 1H-MRS SUCCES sequence for the identification of SDH deficiency in PPGL patients.

Methods

Forty-nine patients presenting with 50 PPGLs were prospectively enrolled in our referral center for 1H-MRS SUCCES. Two observers blinded to the clinical characteristics and genetic status analyzed the presence of a succinate peak and confronted the results to a composite gold standard combining PPGL genetic testing and/or in vitro protein analyses in the tumor.

Results

A succinate peak was observed in 20 tumors, all of which had proven SDH deficiency using the gold standard (17 patients with germline SDHx mutations, 2 with a somatic SDHD mutation, and 1 with negative SDHB IHC and SDH loss of function). A false negative result was observed in 3 tumors. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of 1H-MRS SUCCES were respectively 87%, 100%, 100%, 90%, and 94%.

Conclusions

Detection of succinate using 1H-MRS is a highly specific and sensitive hallmark of SDH-deficiency in PPGLs.
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Literatur
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Metadaten
Titel
Succinate detection using in vivo 1H-MR spectroscopy identifies germline and somatic SDHx mutations in paragangliomas
verfasst von
Charlotte Lussey-Lepoutre
Alexandre Bellucci
Nelly Burnichon
Laurence Amar
Alexandre Buffet
Tom Drossart
Sébastien Fontaine
Olivier Clement
Paule Benit
Pierre Rustin
Lionel Groussin
Tchao Meatchi
Anne-Paule Gimenez-Roqueplo
Bertrand Tavitian
Judith Favier
Publikationsdatum
01.06.2020
Verlag
Springer Berlin Heidelberg
Erschienen in
European Journal of Nuclear Medicine and Molecular Imaging / Ausgabe 6/2020
Print ISSN: 1619-7070
Elektronische ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-019-04633-9

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