[Retinopathy caused by interferon. Apropos of a case]

Area of Science:

• Ophthalmology
• Toxicology
• Oncology

Background:

• Alpha interferon is a cytokine used in treating various cancers and viral infections.
• Retinal toxicity is a known but uncommon side effect of alpha interferon therapy.
• The severity of retinopathy is typically associated with diabetes mellitus.

Observation:

• A case of severe toxic retinopathy is reported in a 20-year-old female patient undergoing alpha interferon treatment.
• The patient had no history of diabetes mellitus, making the severity of the condition unusual.
• Visual acuity recovery was incomplete despite normalization of angiographic findings.

Findings:

• Alpha interferon-induced toxic retinopathy can occur with significant severity in non-diabetic individuals.
• Angiographic normalization does not always correlate with complete visual recovery.
• Retinal microangiopathy may be a predisposing factor for severe interferon toxicity.

Implications:

• Non-diabetic patients with pre-existing retinal microangiopathy receiving interferon therapy are at high risk for severe toxic retinopathy.
• Close ophthalmological surveillance is crucial for patients on interferon therapy, especially those with risk factors.
• Further research is needed to understand the mechanisms and optimize management of interferon-induced retinopathy in non-diabetic populations.