Uveal melanoma MRI: Difference between revisions

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[[File:Axial T1 choroidal melanoma.jpg|thumb|none|200px|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Preveen Jha [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/choroidal-melanoma-1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>]]
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[[File:Coronal T1 choroidal melanoma.jpg|thumb|none|200px|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Preveen Jha [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/choroidal-melanoma-1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>]]
Axial T1 choroidal melanoma.jpg|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Preveen Jha [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/choroidal-melanoma-1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>
 
Coronal T1 choroidal melanoma.jpg|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Preveen Jha [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/choroidal-melanoma-1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>
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==References==
==References==
{{reflist|2}}
{{reflist|2}}

Revision as of 19:17, 29 October 2015

Uveal melanoma Microchapters

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [2]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [3]

Overview

Head and neck MRI scan is diagnostic of uveal melanoma. On head and neck MRI, uveal melanoma is characterized by isointense to hypointense mass on T1-weighted MRI and hyperintense mass on T2-weighted MRI.[1]

MRI

MRI is the modality of choice for assessment of malignant uveal melanomas.[1]

MRI component Features
T1 or Proton Density
  • Uveal melanomas are seen as moderately high signal mass lesion
  • Associated exudative retinal detachment is moderately high signal
T2
  • Moderately low signal mass lesion
  • Associated exudative retinal detachment is moderately high signal
  • Haemorrhagic subretinal fluid has variable signal pattern
T1 contrast with gadolinium
  • Tumors enhance
  • Fat suppression useful in detecting extraocular extention
  • Ultrasound showing primary uveal melanoma[2]

    Ultrasound showing primary uveal melanoma[2]

  • Ultrasound showing primary uveal melanoma[2]

    Ultrasound showing primary uveal melanoma[2]

References

  1. ↑ 1.0 1.1 Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015
  2. ↑ 2.0 2.1 Image courtesy of Dr. Preveen Jha Radiopaedia (original file [1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC

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