File:Anaplastic astrocytoma IDH mutant (Radiopaedia 50046-55341 MRS 1).png

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Summary:

Description	Radiopaedia case ID: 50046 Image ID: 27081579 Image stack position: 1/34 Aux modality: MRS Modality: MRI System: Central Nervous System Findings: A right frontal lesion is present demonstrating mass-effect on the inferior aspect of the superior frontal gyrus. The lesion is T1 hypointense and T2 hyperintense with incomplete suppression, occasional areas of central irregular low signal and a peripheral high rim on FLAIR. The lesion demonstrates no enhancement, is well defined and there is no surrounding edema. Whilst the distinction between intra and extra-axial location is somewhat difficult, a cortically-based tumor arising from the middle frontal gyrus is strongly favored. No significant diffusion restriction. No intrinsic or surrounding gradient susceptibility cerebral blood volume (CBV) is not elevated and spectroscopy is equivocal. No additional lesions identified. Conclusion: The lesion is favored to represent a low-grade cortically-based tumor such as a DNET, diffuse astrocytoma or oligoastrocytoma.
Date	Published: 24th Dec 2016
Source	https://radiopaedia.org/cases/anaplastic-astrocytoma-idh-mutant
Author	Frank Gaillard
Permission (Permission-reusing-text)	http://creativecommons.org/licenses/by-nc-sa/3.0/

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