Presentation
Follow-up post left nephrectomy.
Patient Data
Age: 60 years
Gender: Female
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Axial C+ arterial phase

The right renal artery has a "string of beads" appearance consistent with fibromuscular dysplasia. There is a large aneurysm arising from a superior branch. Left nephrectomy.
Case Discussion
Fibromuscular dysplasia (FMD) is the most common cause of renal artery aneurysms. Approximately 40% of patients with FMD develop a renal artery aneurysm, although renal artery aneurysms themselves are considered a rare entity.