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Open Access 08-05-2024 | Meningioma | Original Article

11C-Methionine uptake in meningiomas after stereotactic radiotherapy

Authors: Hanne-Rinck Jeltema, Bart R. J. van Dijken, Katalin Tamási, Gea Drost, Mart A. A. M. Heesters, Anouk van der Hoorn, Andor W. J. M. Glaudemans, J. Marc C. van Dijk

Published in: Annals of Nuclear Medicine

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Abstract

Objective

11C-Methionine positron emission tomography (MET-PET) is used for stereotactic radiotherapy planning in meningioma patients. The role of MET-PET during subsequent follow-up (FU) is unclear. We analyzed the uptake of 11C-Methionine before and after stereotactic radiotherapy (SRT) in patients with a complex meningioma and investigated if there was a difference between patients with progressive disease (PD) and stable disease (SD) during FU.

Methods

This retrospective study investigates 62 MET-PETs in 29 complex meningioma patients. Standardized uptake value (SUV)max and SUVpeak tumor-to-normal ratios (T/N-ratios) were calculated, comparing the tumor region with both the mirroring intracranial area and the right frontal gray matter. The difference in 11C-Methionine uptake pre- and post-SRT was analyzed, as well as the change in uptake between PD or SD.

Results

Median (IQR) FU duration was 67 months (50.5–91.0). The uptake of 11C-Methionine in meningiomas remained increased after SRT. Neither a statistically significant difference between MET-PETs before and after SRT was encountered, nor a significant difference in one of the four T/N-ratios between patients with SD versus PD with median (IQR) SUVmax T/NR front 2.65 (2.13–3.68) vs 2.97 (1.55–3.54) [p = 0.66]; SUVmax T/Nmirror 2.92 (2.19–3.71) vs 2.95 (1.74–3.60) [p = 0.61]; SUVpeak T/NR front 2.35 (1.64–3.40) vs 2.25 (1.44–3.74) [p = 0.80]; SUVpeak T/Nmirror 2.38 (1.91–3.36) vs 2.35 (1.56–3.72) [p = 0.95].

Conclusions

Our data do not support use of MET-PET during FU of complex intracranial meningiomas after SRT. MET-PET could not differentiate between progressive or stable disease.
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Metadata
Title
11C-Methionine uptake in meningiomas after stereotactic radiotherapy
Authors
Hanne-Rinck Jeltema
Bart R. J. van Dijken
Katalin Tamási
Gea Drost
Mart A. A. M. Heesters
Anouk van der Hoorn
Andor W. J. M. Glaudemans
J. Marc C. van Dijk
Publication date
08-05-2024
Publisher
Springer Nature Singapore
Published in
Annals of Nuclear Medicine
Print ISSN: 0914-7187
Electronic ISSN: 1864-6433
DOI
https://doi.org/10.1007/s12149-024-01932-6