What are the distinctive features of intraocular choroidal melanoma on ultrasound?

Updated: Dec 12, 2018
  • Author: Enrique Garcia-Valenzuela, MD, PhD; Chief Editor: Andrew A Dahl, MD, FACS  more...
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Answer

Answer

Intraocular melanomas have several distinctive features, as follows:

  • Low-to-medium reflectivity

  • Excavation of underlying uveal tissue

  • Shadowing of subjacent soft tissues

  • Internal vascularity

  • An acoustic quiet zone at the base of the tumor called acoustic hollowing

Ultrasound biomicroscopy (UBM) uses high-frequency waves, with excellent resolution for anterior ocular abnormalities. It can differentiate very anterior choroidal melanomas from those of ciliary body origin and can help define the tumor’s anterior border. It is also helpful in assessing angle-closure glaucoma.


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