This 60YO male presented with 20/400 vision in his left eye due to radiation retinopathy caused by prior photon radiation treatment for brain cancer 10 years earlier.
Fundus photography shows some small scattered inner retinal hemorrhages and exudates. Fluoroscein angiography shows superonasal foveal retinal telangiectasia, with mild scattered inferior microvascular changes. OCT shows central and nasal thickening from large outer retinal cysts. Anti-VEGF therapy was started.
Learning Points:
Radiation retinopathy usually occurs 3 months to 3 years after external beam radiation (e.g., for facial or orbital cancers) or plaque radiotherapy. The ocular findings closely resemble those seen with diabetic retinopathy.
