Intracerebral metastases MRI: Difference between revisions
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==MRI== | ==MRI== | ||
*On MRI, brain metastases are typically found in the watershed areas of the brain (areas where blood vessels narrow and act as a trap for clumps of tumor cells).<ref name="Khuntia2015">{{cite journal|last1=Khuntia|first1=Deepak|title=Contemporary Review of the Management of Brain Metastasis with Radiation|journal=Advances in Neuroscience|volume=2015|year=2015|pages=1–13|issn=2356-6787|doi=10.1155/2015/372856}}</ref> | |||
'''T1W:''' Typically iso to hypointense mass, however melanoma metastases are an exception to this rule (hyperintense due to the paramagnetic properties of melanin). | '''T1W:''' Typically iso to hypointense mass, however melanoma metastases are an exception to this rule (hyperintense due to the paramagnetic properties of melanin). | ||
Revision as of 21:37, 9 November 2015
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Intracerebral metastases Microchapters |
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Differentiating Intracerebral Metastases from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Intracerebral metastases MRI On the Web |
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American Roentgen Ray Society Images of Intracerebral metastases MRI |
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Risk calculators and risk factors for Intracerebral metastases MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Sujit Routray, M.D. [2]
Overview
MRI
- On MRI, brain metastases are typically found in the watershed areas of the brain (areas where blood vessels narrow and act as a trap for clumps of tumor cells).[1]
T1W: Typically iso to hypointense mass, however melanoma metastases are an exception to this rule (hyperintense due to the paramagnetic properties of melanin).
T2W: Typically hyperintense. If metastases are scattered the pattern may mimic vascular disease.
FLAIR: Typically hyperintense with hyperintense peritumoral edema.
T1 C+: The enhancement pattern can be uniform, punctuate, or ring-enhanced, but it is usually intense. Delayed sequences may show additional lesions, therefore contrast-enhance MR is the current standard for small met detection.
MRS: Intratumoral choline peak with no choline elevation in the peritumoral edema. Any tumor necrosis results in a lipid peak.
DWI: edema is out of proportion with tumour size and appears dark on trace-weighted DWI. Nuclear medicine
Gallery
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![Brain metastasis in the right cerebral hemisphere from lung cancer shown on T1-weighted magnetic resonance imaging with intravenous contrast.[2]](/images/4/4f/Brain_metastases_MRT-T1WI.jpg)
Brain metastasis in the right cerebral hemisphere from lung cancer shown on T1-weighted magnetic resonance imaging with intravenous contrast.[2]
![Brain metastasis in the right cerebral hemisphere from lung cancer shown on T1-weighted magnetic resonance imaging with intravenous contrast.[2]](/index.php/File:Brain_metastases_MRT-T1WI.jpg)
References
- ↑ Khuntia, Deepak (2015). "Contemporary Review of the Management of Brain Metastasis with Radiation". Advances in Neuroscience. 2015: 1–13. doi:10.1155/2015/372856. ISSN 2356-6787.
- ↑ MRI image of brain metastasis. Wikipedia 2015. https://en.wikipedia.org/wiki/Brain_metastasis. Accessed on November 9, 2015