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ABSTRACT: Background
Several studies have demonstrated that 11C-methionine positron-emission tomography provides information on prognosis.Purpose
We performed a systematic review and meta-analysis of the prognostic value of the metabolic and volumetric parameters of 11C-methionine-PET for gliomas.Data sources
A systematic search was performed using the following combination of keywords: "methionine," "PET," "glioma," and "prognosis."Study selection
The inclusion criteria were the use of 11C-methionine-PET as an imaging tool, studies limited to gliomas, studies including metabolic parameters (tumor-to-normal ratio) and/or volumetric parameters (metabolic tumor volume), and studies reporting survival data. The electronic search first identified 181 records, and 14 studies were selected.Data analysis
Event-free survival and overall survival were the outcome measures of interest. The effect of the tumor-to-normal ratio and metabolic tumor volume on survival was determined by the effect size of the hazard ratio. Hazard ratios were extracted directly from each study when provided or determined by analyzing the Kaplan-Meier curves.Data synthesis
The combined hazard ratios of the tumor-to-normal ratio for event-free survival was 1.74 with no significance and that of the tumor-to-normal ratio for overall survival was 2.02 with significance. The combined hazard ratio of the metabolic tumor volume for event-free survival was 2.72 with significance and that of the metabolic tumor volume for overall survival was 3.50 with significance.Limitations
The studies selected were all retrospective, and there were only 4 studies involving the metabolic tumor volume.Conclusions
The present meta-analysis of 11C-methionine-PET suggests that the tumor-to-normal ratio for overall survival and the metabolic tumor volume for event-free survival and overall survival are significant prognostic factors for patients with gliomas.
SUBMITTER: Kim YI
PROVIDER: S-EPMC7655266 | biostudies-literature | 2018 Sep
REPOSITORIES: biostudies-literature
Kim Y-I YI Kim Y Y Lee J Y JY Jang S J SJ
AJNR. American journal of neuroradiology 20180628 9
<h4>Background</h4>Several studies have demonstrated that <sup>11</sup>C-methionine positron-emission tomography provides information on prognosis.<h4>Purpose</h4>We performed a systematic review and meta-analysis of the prognostic value of the metabolic and volumetric parameters of <sup>11</sup>C-methionine-PET for gliomas.<h4>Data sources</h4>A systematic search was performed using the following combination of keywords: "methionine," "PET," "glioma," and "prognosis."<h4>Study selection</h4>The ...[more]