Published in:
01-02-2019 | Short Report
There is an exception to every rule—T2-FLAIR mismatch sign in gliomas
Authors:
Derek R. Johnson, Timothy J. Kaufmann, Sohil H. Patel, Andrew S. Chi, Matija Snuderl, Rajan Jain
Published in:
Neuroradiology
|
Issue 2/2019
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Abstract
The T2-FLAIR mismatch sign, in which a low-grade glioma is hyperintense on T2-weighted MR and centrally hypointense on T2-weighted FLAIR MR, has been reported as 100% specific for IDH-mutant astrocytomas in several series. We report several cases of “false positive” T2-FLAIR mismatch sign occurring outside the context of IDH-mutant astrocytomas, predominantly in children or young adults with pediatric-type gliomas. These results suggest caution in the interpretation of the T2-FLAIR mismatch sign in the pediatric glioma population.