Uveal melanoma MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Simrat Sarai, M.D. [2]

Overview

Head and neck MRI scan is diagnostic of uveal melanoma. On head and neck MRI, uveal melanoma is characterized by isointense to hypointense mass on T1-weighted MRI and hyperintense mass on T2-weighted MRI.

MRI

MRI is the modality of choice for assessment of malignant uveal melanomas.

MRI component	Features
T1 or Proton Density	Uveal melanomas are seen as moderately high signal mass lesion Associated exudative retinal detachment is moderately high signal
T2	Moderately low signal mass lesion Associated exudative retinal detachment is moderately high signal Haemorrhagic subretinal fluid has variable signal pattern
T1 contrast with gadolinium	Tumors enhance Fat suppression useful in detecting extraocular extention