Uveal melanoma ultrasound: Difference between revisions

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On ultrasound, uveal melanoma is characterized by internal vascularity, collar button shape, and solid low to medium echotexture.<ref name="radio">  Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015</ref>
On ultrasound, uveal melanoma is characterized by internal vascularity, collar button shape, and solid low to medium echotexture.<ref name="radio">  Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015</ref>
==Ultrasound==
==Ultrasound==
Ultrasound is an excellent modality for examining the globe and is able to visualise small plaque like or discoid uveal melanoma, with a thickness of less than 3 mm, which are usually difficult to assess on CT or MRI. Common features that may be present include:<ref name="radio">  Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015</ref>  
Ultrasound is an excellent modality for examining the globe and is able to visualise small plaque like or discoid uveal melanoma, with a thickness of less than 3 mm, which are usually difficult to assess on [[CT]] or [[MRI]]. Common features that may be present include:<ref name="radio">  Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015</ref>  
*Solid low to medium echotexture
*Solid low to medium echotexture
*Internal vascularity
*Internal vascularity
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**Tumors may be irregular, lobulated or domed
**Tumors may be irregular, lobulated or domed
Less common features that may be present include:
Less common features that may be present include:
*Retinal detachment
*[[Retinal detachment]]
*Posterior scleral bowing
*Posterior [[scleral]] bowing
*Choroidal excavation  
*[[Choroidal]] excavation  
*Vitreous or subretinal seeding  
*[[Vitreous]] or [[subretinal]] seeding  
Additionally larger tumour are often significantly sound attenuating.  
Additionally larger [[tumor]] are often significantly sound attenuating.  
[[File:Uveal melanoma uveal melanoma.jpg|thumb|none|200px|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Ahmed Abd Rabou [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/primary-uveal-melanoma]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>]]
[[File:Uveal melanoma uveal melanoma.jpg|thumb|none|200px|Ultrasound showing primary uveal melanoma<ref name="radio1">Image courtesy of Dr. Ahmed Abd Rabou [http://www.radiopaedia.org Radiopaedia] (original file [http://radiopaedia.org/cases/primary-uveal-melanoma]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC</ref>]]
== References ==  
== References ==  
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Latest revision as of 17:35, 27 November 2017

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

On ultrasound, uveal melanoma is characterized by internal vascularity, collar button shape, and solid low to medium echotexture.[1]

Ultrasound

Ultrasound is an excellent modality for examining the globe and is able to visualise small plaque like or discoid uveal melanoma, with a thickness of less than 3 mm, which are usually difficult to assess on CT or MRI. Common features that may be present include:[1]

  • Solid low to medium echotexture
  • Internal vascularity
  • Collar button shape
    • This is the classic shape but not always the case
    • Represents the tumor having broken through Bruch's membrane
    • Tumors may be irregular, lobulated or domed

Less common features that may be present include:

Additionally larger tumor are often significantly sound attenuating.

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. Image courtesy of Dr. Ahmed Abd Rabou Radiopaedia (original file [1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC

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