| Summary: | Purpose: We present fundus and spectral domain optical coherence tomography findings of a patient with an arterial macroaneurysm of the optic disc. Observations: An 87-year-old woman presented with blurry vision and was found to have a retinal arterial macroaneurysm on the optic disc. Spectral domain optical coherence tomography revealed abnormal saccular arterial dilatation on the disc with an elongation anteriorly and superficial prepapillary hemorrhages. After 2 months, aneurysm thrombosed spontaneously without any visual consequences. Conclusions and importance: Spectral domain optical coherence tomography can be used for the diagnosis and follow up of optic disc arterial macroaneurysms. Our case documents the natural history and unique spectral domain optical coherence tomography appearance of an optic disc arterial macroaneurysm. Keywords: Optic disc, Optical coherence tomography, Retinal arterial macroaneurysm
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