Abstract
Introduction
Uveitis is a term used to describe inflammation of the choroid, iris, or ciliary body, which make up the uveal tract. It can be idiopathic or associated with a systemic disease which may be infectious or noninfectious. With the exception of B-scan ultrasonography, current imaging methods for diagnosing and monitoring uveitis are predominately non-radiologic. Although MRI has been anecdotally shown to detect various inflammatory conditions of the globe, such as posterior scleritis, endophthalmitis, and posterior uveitis secondary to Vogt-Koyanagi-Harada disease, a more comprehensive review of the MRI findings in uveitis of various etiologies is presented here.
Methods
The MRI and CT studies of seven patients with uveitis and the clinical history of three of them (not available in four patients) were reviewed. Etiologies included ankylosing spondylitis, relapsing polychondritis, Vogt-Koyanagi-Harada disease, sarcoidosis, and tuberculosis.
Results
Increased gadolinium enhancement of the uveal tract, which is visualized as the enhancing layer immediately deep to the low-signal sclera, was seen on all six MRI studies. Diffusion-weighted imaging of a case with posterior uveitis and subretinal effusions revealed restriction within the uvea and effusions. Two patients had inflammatory nodules adherent to the uvea, two patients had vitreous humor abnormalities, and one patient exhibited proximal perineural and perimuscular spread of enhancement. Uveoscleral thickening and enhancement with a posterior calcification were observed in the patient with chronic uveitis imaged with CT.
Conclusions
Increased uveal tract enhancement is a common finding in patients with uveitis, regardless of anatomic distribution and etiology. MRI can also further evaluate complications of uveitis and help differentiate it from masquerade syndromes.
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Abbreviations
- CT:
-
Computed tomography
- MRI:
-
Magnetic resonance imaging
- T1WI, T2WI:
-
T1-weighted image, T2-weighted image
- FLAIR:
-
Fluid-attenuated inversion recovery
- DWI:
-
Diffusion-weighted imaging
- ADC:
-
Apparent diffusion coefficient
- HLA:
-
Human leukocyte antigen
- VKH:
-
Vogt-Koyanagi-Harada
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Acknowledgments
The authors would like to thank Dr. Brandon C. Cho for his clinical expertise in uveitis management.
Ethical standards and patient consent
We declare that all human and animal studies have been approved by the University of California, San Diego, Institutional Review Board and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. We declare that the Institutional Review Board waived informed consent for all patients prior to inclusion in this study.
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We declare that we have no conflict of interest.
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Li, C.Q., Cho, A.A., Edward, N.J. et al. Magnetic resonance imaging of uveitis. Neuroradiology 57, 825–832 (2015). https://doi.org/10.1007/s00234-015-1531-7
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DOI: https://doi.org/10.1007/s00234-015-1531-7