Intracerebral metastases MRI: Difference between revisions

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Image:MRI of brain metastasis 5.jpg|<sub>A 40 year old female previously operated for metastatic brain lesion from Ca thyroid presents with altered sensorium. Patient earlier had thyroidectomy 1 year ago. Axial T2 MRI scan reveals left parietal lobe lesion with adjacent perilesional edema with an skull vault lesion at the previous craniotomy site. Skull vault lesion shows intense homogeneous enhancement.<ref name=mriimage5>Image courtesy of Dr. Paresh K Desai. Radiopaedia (original file [http://radiopaedia.org/cases/metastases-from-follicular-carcinoma-thyroid here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 5.jpg|<sub>A 40 year old female previously operated for metastatic brain lesion from Ca thyroid presents with altered sensorium. Patient earlier had thyroidectomy 1 year ago. Axial T2 MRI scan reveals left parietal lobe lesion with adjacent perilesional edema with an skull vault lesion at the previous craniotomy site. Skull vault lesion shows intense homogeneous enhancement.<ref name=mriimage5>Image courtesy of Dr. Paresh K Desai. Radiopaedia (original file [http://radiopaedia.org/cases/metastases-from-follicular-carcinoma-thyroid here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 6.jpg|<sub>T1-weighted MRI head of a 65 year old male with advanced breast cancer demonstrates bilateral thalamic (and some smaller peripheral) metastases. The larger, partly cystic lesion on the right traverses the midline across the third ventricle.<ref name=mriimage6>Image courtesy of Dr. Roberto Schubert. Radiopaedia (original file [http://radiopaedia.org/cases/brain-metastases-involving-the-interthalamic-adhesion here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 6.jpg|<sub>T1-weighted MRI head of a 65 year old male with advanced breast cancer demonstrates bilateral thalamic (and some smaller peripheral) metastases. The larger, partly cystic lesion on the right traverses the midline across the third ventricle.<ref name=mriimage6>Image courtesy of Dr. Roberto Schubert. Radiopaedia (original file [http://radiopaedia.org/cases/brain-metastases-involving-the-interthalamic-adhesion here]). Creative Commons BY-SA-NC</ref></sub>
 
Image:MRI of brain metastasis 7.jpg|<sub>Axial FLAIR MRI head of a 60 year old male with known history of advanced colorectal cancer demonstrates multiple intracerebral metastases.<ref name=mriimage7>Image courtesy of Dr. M Shebl. Radiopaedia (original file [http://radiopaedia.org/cases/cerebral-metastases-colorectal-cancer here]). Creative Commons BY-SA-NC</ref></sub>


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Revision as of 19:37, 13 November 2015

Intracerebral metastases Microchapters

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Overview

Historical Perspective

Classification

Pathophysiology

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Differentiating Intracerebral Metastases from other Diseases

Epidemiology and Demographics

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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]
MRI component Findings

T1

  • Typically iso- to hypointense
  • If hemorrhagic, may have intrinsic high signal
  • Non-hemorrhagic melanoma metastases can also have intrinsic high signal due to the paramagnetic properties of melanin

T1 with contrast

  • Enhancement pattern can be uniform, punctate, or ring-enhancing, but it is usually intense
  • Delayed sequences may show additional lesions, therefore contrast-enhanced MRI is the current standard for small metastases detection

T2

  • Typically hyperintense
  • Hemorrhage may alter this (hypointense)

FLAIR

  • Typically hyperintense with hyperintense peri-tumoral edema

Diffusion weighted imaging (DWI)

  • Edema is out of proportion with tumor size and appears dark on trace-weighted DWI

Gallery

References

  1. 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.
  2. MRI image of brain metastasis. Wikipedia 2015. https://en.wikipedia.org/wiki/Brain_metastasis. Accessed on November 9, 2015
  3. Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC
  4. Image courtesy of Dr. Laughlin Dawes. Radiopaedia (original file here). Creative Commons BY-SA-NC
  5. Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC
  6. Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC
  7. Image courtesy of Dr. Paresh K Desai. Radiopaedia (original file here). Creative Commons BY-SA-NC
  8. Image courtesy of Dr. Roberto Schubert. Radiopaedia (original file here). Creative Commons BY-SA-NC
  9. Image courtesy of Dr. M Shebl. Radiopaedia (original file here). Creative Commons BY-SA-NC


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