Uveal melanoma ultrasound

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

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 tumor are often significantly sound attenuating.

Template:WikiDoc Sources