Solitary Kidney With Renal Artery Aneurysm Repaired by Ex Vivo Reconstruction

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A 22-year-old pregnant female with pyelonephritis was found to have a 26-mm left renal artery aneurysm with unknown right kidney agenesis diagnosed by magnetic resonance imaging. Computed tomographic angiography with 3-dimensional reconstructions confirmed a saccular aneurysm localized at the bifurcation of the left posterior segmental artery. The patient ultimately underwent successful ex vivo left renal artery aneurysm repair with autotransplantation. Pathologic evaluation of the resected aneurysm confirmed the diagnosis of fibromuscular dysplasia. Fibromuscular dysplasia is the most common cause of renal artery stenosis and renovascular hypertension and can, in rare cases, be associated with the development of renal artery aneurysms.

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