Intracerebral metastases MRI: Difference between revisions

Jump to navigation Jump to search
VisualWikitext
Line 51: Line 51:
Image:MRI of brain metastasis 3.jpg|<sub>Axial T1 MRI scan of an elderly patient with history of small cell lung cancer, presenting with increasing headaches, demonstrates multiple cystic cerebral metastases.<ref name=mriimage3>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/cerebral-metastases-1 here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 3.jpg|<sub>Axial T1 MRI scan of an elderly patient with history of small cell lung cancer, presenting with increasing headaches, demonstrates multiple cystic cerebral metastases.<ref name=mriimage3>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/cerebral-metastases-1 here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 4.jpg|<sub>MRI head with contrast in a known case of renal cell carcinoma demonstrates multiple, large, well-defined, round, solid-cystic, peripheral irregular enhancement mass lesions involving left cerebral hemisphere and corpus callosum, crossing the midline anteriorly. Areas of necrosis and hemorrhage are seen within the lesion. Associated mass effect and moderate peritumoral edema is observed.<ref name=mriimage4>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/cerebral-metastases-rcc here]). Creative Commons BY-SA-NC</ref></sub>
Image:MRI of brain metastasis 4.jpg|<sub>MRI head with contrast in a known case of renal cell carcinoma demonstrates multiple, large, well-defined, round, solid-cystic, peripheral irregular enhancement mass lesions involving left cerebral hemisphere and corpus callosum, crossing the midline anteriorly. Areas of necrosis and hemorrhage are seen within the lesion. Associated mass effect and moderate peritumoral edema is observed.<ref name=mriimage4>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/cerebral-metastases-rcc 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>




Revision as of 19:24, 13 November 2015

Intracerebral metastases Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Intracerebral Metastases from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

Staging

History and Symptoms

Physical Examination

Laboratory Findings

Chest X Ray

CT

MRI

Ultrasound

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Intracerebral metastases MRI On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Intracerebral metastases MRI

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Intracerebral metastases MRI

CDC on Intracerebral metastases MRI

Intracerebral metastases MRI in the news

Blogs on Intracerebral metastases MRI

Directions to Hospitals Treating Intracerebral metastases

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]
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

  • 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]

  • Coronal T1 C+ head within the parieto-occipital region on the left demonstrates 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]

    Coronal T1 C+ head within the parieto-occipital region on the left demonstrates 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]

  • Axial T2 MRI scan of 60 year old female with known history of malignant melanoma, complaining of acute right hemiplegia, aphasia, and confusion, demonstrates a large cerebral haematoma with a fluid-fluid level. There is a smaller low signal area anteriorly which corresponded to the known metastasis. This smaller area enhanced after gadolinium, as did the overlying dura.[4]

    Axial T2 MRI scan of 60 year old female with known history of malignant melanoma, complaining of acute right hemiplegia, aphasia, and confusion, demonstrates a large cerebral haematoma with a fluid-fluid level. There is a smaller low signal area anteriorly which corresponded to the known metastasis. This smaller area enhanced after gadolinium, as did the overlying dura.[4]

  • Axial T1 MRI scan of an elderly patient with history of small cell lung cancer, presenting with increasing headaches, demonstrates multiple cystic cerebral metastases.[5]

    Axial T1 MRI scan of an elderly patient with history of small cell lung cancer, presenting with increasing headaches, demonstrates multiple cystic cerebral metastases.[5]

  • MRI head with contrast in a known case of renal cell carcinoma demonstrates multiple, large, well-defined, round, solid-cystic, peripheral irregular enhancement mass lesions involving left cerebral hemisphere and corpus callosum, crossing the midline anteriorly. Areas of necrosis and hemorrhage are seen within the lesion. Associated mass effect and moderate peritumoral edema is observed.[6]

    MRI head with contrast in a known case of renal cell carcinoma demonstrates multiple, large, well-defined, round, solid-cystic, peripheral irregular enhancement mass lesions involving left cerebral hemisphere and corpus callosum, crossing the midline anteriorly. Areas of necrosis and hemorrhage are seen within the lesion. Associated mass effect and moderate peritumoral edema is observed.[6]

  • 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.[7]

    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.[7]

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


Template:WikiDoc Sources

Retrieved from "https://www.wikidoc.org/index.php?title=Intracerebral_metastases_MRI&oldid=1186514"