What is the role of MRI in the treatment of choroidal melanoma?

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

Answer

Magnetic resonance imaging (MRI) of the globe and orbit is more expensive than computed tomography (CT) scanning. Use of surface coil imaging and gadolinium as a contrast material greatly improves its resolution, but it still remains less sensitive than ultrasonography. Pigmented melanomas are seen as a high-density image in T1 and as a low-density image in T2 (see the image below). MRI also can be used to determine extrascleral extension of the melanoma and distinguish surrounding fluid from the tumor.

T2-weighted MRI showing a small anterior choroidal T2-weighted MRI showing a small anterior choroidal melanoma in the left eye.

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