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C-methyl-L-methionine PET Measuring Parameters for the Diagnosis of Tumour Progression Against Radiation-induced Changes in Brain Metastases

Overview
Journal Br J Radiol
Specialty Radiology
Date 2021 Jul 8
PMID 34233489
Citations 5
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Abstract

Objectives: Radiation-induced changes (RIC) secondary to focal radiotherapy can imitate tumour progression in brain metastases and make follow-up clinical decision making unreliable. C-methyl-L-methionine-PET (MET-PET) is widely used for the diagnosis of RIC in brain metastases, but minimal literature exists regarding the optimum PET measuring parameter to be used. We analysed the diagnostic performance of different MET-PET measuring parameters in distinguishing between RIC and tumour progression in a retrospective cohort of brain metastasis patients.

Methods: 26 patients with 31 metastatic lesions were included on the basis of having undergone a PET scan due to radiological uncertainty of disease progression. The PET images were analysed and methionine uptake quantified using standardised-uptake-values (SUV) and tumour-to-normal tissue (T/N) ratios, generated as SUV, SUV, SUV, T/N, T/N and T/N. Metabolic-tumour-volume and total-lesion methionine metabolism were also computed. A definitive diagnosis of either RIC or tumour progression was established by clinicoradiological follow-up of least 4 months subsequent to the investigative PET scan.

Results: All MET-PET parameters except metabolic-tumour-volume showed statistically significant differences between tumour progression and lesions with RIC. Receiver-operating-characteristic curve and area-under the-curve analysis demonstrated the highest value of 0.834 for SUV with a corresponding optimum threshold of 3.29. This associated with sensitivity, specificity, positive predictive and negative predictive values of 78.57, 70.59%, 74.32 and 75.25% respectively.

Conclusions: MET-PET is a useful modality for the diagnosis of RIC in brain metastases. SUV was the PET parameter with the greatest diagnostic performance.

Advances In Knowledge: More robust comparisons between SUV and SUV could enhance follow-up treatment planning.

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References
1.
Sneed P, Mendez J, Vemer-van den Hoek J, Seymour Z, Ma L, Molinaro A . Adverse radiation effect after stereotactic radiosurgery for brain metastases: incidence, time course, and risk factors. J Neurosurg. 2015; 123(2):373-86. DOI: 10.3171/2014.10.JNS141610. View

2.
Minniti G, Clarke E, Lanzetta G, Osti M, Trasimeni G, Bozzao A . Stereotactic radiosurgery for brain metastases: analysis of outcome and risk of brain radionecrosis. Radiat Oncol. 2011; 6:48. PMC: 3108308. DOI: 10.1186/1748-717X-6-48. View

3.
Dankbaar J, Snijders T, Robe P, Seute T, Eppinga W, Hendrikse J . The use of (18)F-FDG PET to differentiate progressive disease from treatment induced necrosis in high grade glioma. J Neurooncol. 2015; 125(1):167-75. PMC: 4592487. DOI: 10.1007/s11060-015-1883-1. View

4.
Grosu A, Astner S, Riedel E, Nieder C, Wiedenmann N, Heinemann F . An interindividual comparison of O-(2-[18F]fluoroethyl)-L-tyrosine (FET)- and L-[methyl-11C]methionine (MET)-PET in patients with brain gliomas and metastases. Int J Radiat Oncol Biol Phys. 2011; 81(4):1049-58. DOI: 10.1016/j.ijrobp.2010.07.002. View

5.
Aide N, Lasnon C, Veit-Haibach P, Sera T, Sattler B, Boellaard R . EANM/EARL harmonization strategies in PET quantification: from daily practice to multicentre oncological studies. Eur J Nucl Med Mol Imaging. 2017; 44(Suppl 1):17-31. PMC: 5541084. DOI: 10.1007/s00259-017-3740-2. View