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Updated: Apr 21, 2026

The Rodent Model of Nonarteritic Anterior Ischemic Optic Neuropathy rNAION
Published on: November 20, 2016
Arteriolar macroaneurysm on the optic disk associated with branch retinal vein occlusion
Toshiyuki Fujiwara1, Tomohiro Iida, Kimimori Saito
1From the Department of Ophthalmology, Fukushima Medical University School of Medicine, Fukushima, Japan.
Purpose:
To report a case of an arteriolar macroaneurysm on the optic disk associated with branch retinal vein occlusion (BRVO).
Method:
Patient chart review.
Patient:
An 80-year-old man presented with a retinal arteriolar macroaneurysm on the optic disk on the root of a papillomacular vein, which caused BRVO.
Results:
Eight months later, the macroaneurysm shrank spontaneously and became fibrous tissue. The hemorrhage and edema due to BRVO resolved.
Discussion:
We speculate that the macroaneurysm was located on and compressed the epipapillary portion of the papillomacular vein, resulting in BRVO. With spontaneous involution of the macroaneurysm, the compression resolved, and the clinical findings improved.
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