Paraneoplastic uveitis

Paraneoplastic uveitis is a rare inflammatory condition of the uveal tract (the middle vascular layer of the eye, comprising the iris, ciliary body, and choroid) that occurs as a paraneoplastic phenomenon — meaning it arises not from direct tumor invasion of the eye, but as an immune-mediated response triggered by a distant malignancy. The condition is classified among paraneoplastic ocular syndromes and may be associated with various underlying cancers, including lymphomas, lung carcinomas, and other solid or hematologic malignancies. The immune system, activated against tumor antigens, cross-reacts with normal ocular tissues, leading to intraocular inflammation. Patients typically present with eye redness, pain, photophobia (light sensitivity), blurred vision, and floaters. The uveitis may be anterior (affecting the iris and ciliary body), intermediate, posterior (affecting the choroid and retina), or panuveitic. It can be unilateral or bilateral. Because the ocular symptoms may precede the diagnosis of the underlying malignancy, recognition of the paraneoplastic nature of the uveitis is critical for early cancer detection. Other paraneoplastic ocular conditions, such as cancer-associated retinopathy (CAR) and melanoma-associated retinopathy (MAR), may overlap or coexist. Treatment of paraneoplastic uveitis involves a dual approach: management of the underlying malignancy and control of the ocular inflammation. Topical and systemic corticosteroids are commonly used to reduce intraocular inflammation. Immunosuppressive agents may be required in refractory cases. Successful treatment of the underlying cancer often leads to improvement or resolution of the uveitis. Prognosis depends on the nature and stage of the associated malignancy as well as the severity and chronicity of the ocular inflammation. Early referral to both an oncologist and an ophthalmologist experienced in uveitis is essential for optimal outcomes.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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