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Prognostic Value of O-(2-[18F]Fluoroethyl)-L-Tyrosine PET/CT in Newly Diagnosed WHO 2016 Grade II and III Glioma

  • Olivia Kertels
  • Almuth F. Kessler
  • Milena I. Mihovilovic
  • Antje Stolzenburg
  • Thomas Linsenmann
  • Samuel Samnick
  • Stephanie Brändlein
  • Camelia Maria Monoranu
  • Ralf-Ingo Ernestus
  • Andreas K. Buck
  • Mario Löhr
  • Constantin LapaEmail author
Research Article

Abstract

Purpose

The use of [18F]fluoroethyl)-l-tyrosine ([18F]FET) positron emission tomography/computed tomography (PET/CT) has proven valuable in brain tumor management. This study aimed to investigate the prognostic value of radiotracer uptake in newly diagnosed grade II or III gliomas according to the current 2016 World Health Organization (WHO) classification.

Procedures

A total of 35 treatment-naive patients (mean age, 48 ± 17 years) with histologically proven WHO grade II or III gliomas as defined by the current 2016 WHO classification were included. Static PET/CT imaging was performed 20 min after intravenous [18F]FET injection. Images were assessed visually and semi-quantitatively using regions of interest for both tumor (SUVmax, SUVmean) and background (BKGmean) to calculate tumor-to-background (TBR) ratios. The association among histological results, molecular markers (including isocitrate dehydrogenase enzyme and methylguanine-DNA methyltransferase status), clinical features (age), and PET findings was tested and compared with outcome (progression-free [PFS] and overall survival [OS]).

Results

Fourteen patients presented with grade II (diffuse astrocytoma n = 10, oligodendroglioma n = 4) and 21 patients with grade III glioma (anaplastic astrocytoma n = 15, anaplastic oligodendroglioma n = 6). Twenty-seven out of the 35 patients were PET-positive (grade II n = 8/14, grade III n = 19/21), with grade III tumors exhibiting significantly higher amino acid uptake (TBRmean and TBRmax; p = 0.03 and p = 0.02, respectively). PET-negative lesions demonstrated significantly prolonged PFS (p = 0.003) as compared to PET-positive gliomas. PET-positive disease had a complementary value in prognostication in addition to patient age, glioma grade, and molecular markers.

Conclusions

Amino acid uptake as assessed by [18F]FET-PET/CT imaging is useful as non-invasive read-out for tumor biology and prognosis in newly diagnosed, treatment-naive gliomas according to the 2016 WHO classification.

Key Words

Glioma FET PET WHO Prognosis 

Notes

Authors’ Contribution

Initials: Olivia Kertels (OK), Milena I. Mihovilovic (MIM), Antje Stolzenburg (AS), Thomas Linsenmann (TL), Samuel Samnick (SSa), Stephanie Brändlein (SB), Camelia Maria Monoranu (CMM), Ralf-Ingo Ernestus (RIE), Andreas K. Buck (AKB), Mario Löhr (ML), Almuth F. Kessler (AFK), Constantin Lapa (CL)

Conception and design: OK, MIM, TL, AFK, CL

Development of methodology: AS, SSa, SB, CMM, ML, CL

Acquisition of data: OK, MIM, TL, AKB, ML, AFK, CL

Analysis and interpretation of data: OK, MIM, AS, SSa, SB, CMM, RIE, AKB, ML, AFK, CL

Writing, review and/or revision of the manuscript: all authors

Administrative, technical, or material support: SSa, RIE, AKB, ML.

Supervision: RIE, AKB, ML, AFK, CL.

Compliance with Ethical Standards

The study adhered to the standards established in the declaration of Helsinki. Given its retrospective nature, the local ethics committee of the University of Würzburg waived the requirement for additional approval. All subjects gave written informed consent prior to [18F]FET-PET/CT imaging.

Conflict of Interest

The authors declare that they have no conflict of interest.

Supplementary material

11307_2019_1357_MOESM1_ESM.pdf (219 kb)
ESM 1 (PDF 219 kb)

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Copyright information

© World Molecular Imaging Society 2019

Authors and Affiliations

  • Olivia Kertels
    • 1
  • Almuth F. Kessler
    • 2
  • Milena I. Mihovilovic
    • 3
  • Antje Stolzenburg
    • 3
  • Thomas Linsenmann
    • 2
  • Samuel Samnick
    • 3
  • Stephanie Brändlein
    • 4
  • Camelia Maria Monoranu
    • 4
  • Ralf-Ingo Ernestus
    • 2
  • Andreas K. Buck
    • 3
  • Mario Löhr
    • 2
  • Constantin Lapa
    • 3
    Email author
  1. 1.Institute of Diagnostic RadiologyUniversity Hospital WürzburgWurzburgGermany
  2. 2.Department of NeurosurgeryUniversity Hospital WürzburgWurzburgGermany
  3. 3.Department of Nuclear MedicineUniversity Hospital WürzburgWurzburgGermany
  4. 4.Department of Neuropathology, Institute of PathologyUniversity of WürzburgWurzburgGermany

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