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. [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:
- Retinal detachment
- Posterior scleral bowing
- Choroidal excavation
- Vitreous or subretinal seeding
Additionally larger tumour are often significantly sound attenuating.
References
- ↑ 1.0 1.1 Retinoblastoma. Radiopedia(2015) http://radiopaedia.org/articles/primary-uveal-malignant-melanoma Accessed on October 21, 2015
- ↑ Image courtesy of Dr. Ahmed Abd Rabou Radiopaedia (original file [1]).[http://radiopaedia.org/licence Creative Commons BY-SA-NC