Uveal melanoma ultrasound

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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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