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18F-DOPA PET/CT in brain tumors: impact on multidisciplinary brain tumor board decisions

  • Olivier HumbertEmail author
  • Véronique Bourg
  • Lydiane Mondot
  • Jocelyn Gal
  • Pierre-Yves Bondiau
  • Denys Fontaine
  • Esma Saada-Bouzid
  • Marie Paquet
  • David Chardin
  • Fabien Almairac
  • Fanny Vandenbos
  • Jacques Darcourt
Original Article

Abstract

Purpose

This study aimed to assess the therapeutic impact and diagnostic accuracy of 18F-DOPA PET/CT in patients with glioblastoma or brain metastases.

Methods

Patients with histologically proven glioblastoma or brain metastases were prospectively included in this monocentric clinical trial (IMOTEP). Patients were included either due to a clinical suspicion of relapse or to assess residual tumor infiltration after treatment. Multimodality brain MRI and 18F-DOPA PET were performed. Patients’ data were discussed during a Multidisciplinary Neuro-oncology Tumor Board (MNTB) meeting. The discussion was first based on clinical and MRI data, and an initial diagnosis and treatment plan were proposed. Secondly, a new discussion was conducted based on the overall imaging results, including 18F-DOPA PET. A second diagnosis and therapeutic plan were proposed. A retrospective and definitive diagnosis was obtained after a 3-month follow-up and considered as the reference standard.

Results

One hundred six cases were prospectively investigated by the MNTB. All patients with brain metastases (N = 41) had a clinical suspicion of recurrence. The addition of 18F-DOPA PET data changed the diagnosis and treatment plan in 39.0% and 17.1% of patients’ cases, respectively. Concerning patients with a suspicion of recurrent glioblastoma (N = 12), the implementation of 18F-DOPA PET changed the diagnosis and treatment plan in 33.3% of cases. In patients evaluated to assess residual glioblastoma infiltration after treatment (N = 53), 18F-DOPA PET data had a lower impact with only 5.7% (3/53) of diagnostic changes and 3.8% (2/53) of therapeutic plan changes. The definitive reference diagnosis was available in 98/106 patients. For patients with tumor recurrence suspicion, the adjunction of 18F-DOPA PET increased the Younden’s index from 0.44 to 0.53 in brain metastases and from 0.2 to 1.0 in glioblastoma, reflecting an increase in diagnostic accuracy.

Conclusion

18F-DOPA PET has a significant impact on the management of patients with a suspicion of brain tumor recurrence, either glioblastoma or brain metastases, but a low impact when used to evaluate the residual glioblastoma infiltration after a first-line radio-chemotherapy or second-line bevacizumab.

Keywords

18F-DOPA PET Brain tumours Amino acid Therapeutic impact 

Notes

Acknowledgements

We thank Sandrine CHELI for her help in protocol drafting and editing, Renaud Schiappa for database conception and management and Maeva MAURIN for trial management.

Funding

This institutional trial is promoted by the Centre Antoine-Lacassagne. The regional institution Canceropôle PACA provided a subvention to the Centre Antoine-Lacassagne to promote research on brain metastases. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Compliance with ethical standards

Conflict of interest

All authors of this manuscript declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Olivier Humbert
    • 1
    • 2
    • 3
    Email author
  • Véronique Bourg
    • 4
  • Lydiane Mondot
    • 5
  • Jocelyn Gal
    • 6
  • Pierre-Yves Bondiau
    • 7
  • Denys Fontaine
    • 8
  • Esma Saada-Bouzid
    • 9
  • Marie Paquet
    • 1
    • 2
  • David Chardin
    • 1
  • Fabien Almairac
    • 8
  • Fanny Vandenbos
    • 10
  • Jacques Darcourt
    • 1
    • 2
  1. 1.Department of Nuclear MedicineCentre Antoine-Lacassagne, Université Côte d’Azur (UCA)NiceFrance
  2. 2.TIRO-UMR E 4320UCA/CEANiceFrance
  3. 3.Clinical Research and Innovation OfficeUCANiceFrance
  4. 4.Department of NeurologyPasteur 2 University Hospital, UCANiceFrance
  5. 5.Department of NeuroradiologyPasteur 2 University Hospital, UCANiceFrance
  6. 6.Department of BiostatisticsCentre Antoine-Lacassagne, UCANiceFrance
  7. 7.Department of RadiotherapyCentre Antoine-Lacassagne, UCANiceFrance
  8. 8.Department of NeurosurgeryPasteur 2 University Hospital, UCANiceFrance
  9. 9.Department of Medical OncologyCentre Antoine-Lacassagne, UCANiceFrance
  10. 10.Central Laboratory of PathologyPasteur I University Hospital, UCANiceFrance

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