Abstract
In an effort to maximize extent of resection (EOR) regarding gliomas, intraoperative MRI (i-MRI) and 5-aminolevulinic acid (5-ALA) have been developed. Our study aimed to investigate the comparative contribution of 5-aminolevulinic acid and i-MRI in maximizing EOR in gliomas. We searched the PubMed and ScienceDirect services for randomized controlled trials, controlled trials and interrupted time series studies evaluating the effect of i-MRI on gross total resection (GTR) rates and on overall survival in glioma patients. Our primary study endpoint was the definition of the percentage of patients who were offered GTR. Other relevant points of interest included the determination of overall and progression-free survival and subgroup analyses for level of evidence. I-MRI aids in achieving GTR (odds ratio 2.71, p<0.0001). Magnet field strength does not affect significantly either GTR rates (p=0.08). The cost of the procedure is dependent on the workload of the i-MRI system. These data suggest that i-MRI or 5-ALA improves progression-free and overall survival, although there are several restrictions related to their effectiveness and reliability. I-MRI and 5-ALA are considered to be effective adjuncts in the achievement of GTR of gliomas. When these methods are compared, there is no definite conclusion regarding which method is more effective.
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