Use of FET PET in glioblastoma patients undergoing neurooncological treatment including tumour-treating fields: initial experience

  • Garry Ceccon
  • Lazaros Lazaridis
  • Gabriele Stoffels
  • Marion Rapp
  • Manuel Weber
  • Tobias Blau
  • Phillip Lohmann
  • Sied Kebir
  • Ken Herrmann
  • Gereon R. Fink
  • Karl-Josef Langen
  • Martin Glas
  • Norbert Galldiks
Original Article

Abstract

Purpose

We present our first clinical experience with O-(2-18F-fluoroethyl)-l-tyrosine (FET) PET in patients with high-grade glioma treated with various neurooncological therapies including tumour-treating fields (TTFields) for the differentiation of tumour progression from treatment-related changes.

Methods

We retrospectively assessed 12 patients (mean age 51 ± 12 years, range 33–72 years) with high-grade glioma (11 glioblastomas, 1 gliosarcoma) in whom the treatment regimen included TTFields and who had undergone FET PET scans for differentiation of tumour progression from treatment-related changes. Mean and maximum tumour-to-brain ratios (TBRmean, TBRmax) were calculated. The definitive diagnosis (tumour progression or posttherapeutic changes) was confirmed either by histopathology (4 of 12 patients) or on clinical follow-up.

Results

In all nine patients with confirmed tumour progression, the corresponding FET PET showed increased uptake (TBRmax 3.5 ± 0.6, TBRmean 2.7 ± 0.7). In one of these nine patients, FET PET was consistent with treatment-related changes, whereas standard MRI showed a newly diagnosed contrast-enhancing lesion. In two patients treated solely with TTFields without any other concurrent neurooncological therapy, serial FET PET revealed a decrease in metabolic activity over a follow-up of 6 months or no FET uptake without any signs of tumour progression or residual tumour on conventional MRI.

Conclusion

FET PET may add valuable information in monitoring therapy in individual patients with high-grade glioma undergoing neurooncological treatment including TTFields.

Keywords

TTFields Amino acid PET Glioma Treatment-related changes Tumour progression 

Notes

Compliance with ethical standards

Conflicts of interest

None.

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 principles of the1964 Declaration of Helsinki and its later amendments or comparable ethical standards.

Informed consent

Informed written 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 2018

Authors and Affiliations

  • Garry Ceccon
    • 1
  • Lazaros Lazaridis
    • 2
  • Gabriele Stoffels
    • 3
  • Marion Rapp
    • 4
  • Manuel Weber
    • 5
  • Tobias Blau
    • 6
  • Phillip Lohmann
    • 3
  • Sied Kebir
    • 2
  • Ken Herrmann
    • 5
  • Gereon R. Fink
    • 1
    • 3
  • Karl-Josef Langen
    • 3
    • 7
  • Martin Glas
    • 2
  • Norbert Galldiks
    • 1
    • 3
    • 8
  1. 1.Department of NeurologyUniversity Hospital CologneCologneGermany
  2. 2.Division of Clinical Neuro-Oncology, Department of NeurologyUniversity Hospital Essen, University Duisburg-EssenEssenGermany
  3. 3.Institute of Neuroscience and Medicine (INM-3,-4)Forschungszentrum JuelichJuelichGermany
  4. 4.Department of NeurosurgeryUniversity of DüsseldorfDüsseldorfGermany
  5. 5.Department of Nuclear MedicineUniversity of EssenEssenGermany
  6. 6.Department of NeuropathologyUniversity of EssenEssenGermany
  7. 7.Department of Nuclear MedicineUniversity of AachenAachenGermany
  8. 8.Center of Integrated Oncology (CIO)University of CologneCologneGermany

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