Uveal melanoma ultrasound
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Uveal melanoma Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Uveal melanoma ultrasound On the Web |
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American Roentgen Ray Society Images of Uveal melanoma ultrasound |
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Risk calculators and risk factors for Uveal melanoma ultrasound |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]
Overview
On ultrasound, uveal melanoma is characterized by internal vascularity, collar button shape, and solid low to medium echotexture.
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:
- 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:
- Retinal detachment
- Posterior scleral bowing
- Choroidal excavation
- Vitreous or subretinal seeding
Additionally larger tumour are often significantly sound attenuating.