Intracerebral metastases MRI: Difference between revisions
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Image:Brain metastases MRT-T1WI.jpg|<sub>Brain metastasis in the right cerebral hemisphere from lung cancer shown on T1-weighted magnetic resonance imaging with intravenous contrast.<ref name=brainmetastasisimage1>MRI image of brain metastasis. Wikipedia 2015. https://en.wikipedia.org/wiki/Brain_metastasis. Accessed on November 9, 2015</ref></sub> | Image:Brain metastases MRT-T1WI.jpg|<sub>Brain metastasis in the right cerebral hemisphere from lung cancer shown on T1-weighted magnetic resonance imaging with intravenous contrast.<ref name=brainmetastasisimage1>MRI image of brain metastasis. Wikipedia 2015. https://en.wikipedia.org/wiki/Brain_metastasis. Accessed on November 9, 2015</ref></sub> | ||
Image:MRI of brain metastasis 1.jpg|<sub>Within the parieto-occipital region on the left is a very rounded brightly peripherally enhancing mass located near the grey-white junction, surrounded by a moderate amount of vasogenic edema. The central region of lower signal intensity does not enhance nor does it restrict. Features are consistent with the patient's known metastatic disease with bull's eye sign</ref></sub> | Image:MRI of brain metastasis 1.jpg|<sub>Within the parieto-occipital region on the left is a very rounded brightly peripherally enhancing mass located near the grey-white junction, surrounded by a moderate amount of vasogenic edema. The central region of lower signal intensity does not enhance nor does it restrict. Features are consistent with the patient's known metastatic disease with bull's eye sign<ref name=mriimage1>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/bulls-eye-sign-from-cerebral-metastasis here]). Creative Commons BY-SA-NC</ref></sub> | ||
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Revision as of 17:04, 13 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] -
![Within the parieto-occipital region on the left is a very rounded brightly peripherally enhancing mass located near the grey-white junction, surrounded by a moderate amount of vasogenic edema. The central region of lower signal intensity does not enhance nor does it restrict. Features are consistent with the patient's known metastatic disease with bull's eye sign[3]](/images/9/95/MRI_of_brain_metastasis_1.jpg)
Within the parieto-occipital region on the left is a very rounded brightly peripherally enhancing mass located near the grey-white junction, surrounded by a moderate amount of vasogenic edema. The central region of lower signal intensity does not enhance nor does it restrict. Features are consistent with the patient's known metastatic disease with bull's eye sign[3]
![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)
![Within the parieto-occipital region on the left is a very rounded brightly peripherally enhancing mass located near the grey-white junction, surrounded by a moderate amount of vasogenic edema. The central region of lower signal intensity does not enhance nor does it restrict. Features are consistent with the patient's known metastatic disease with bull's eye sign[3]](/index.php/File:MRI_of_brain_metastasis_1.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
- ↑ Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC