Symptomatic hydronephrosis from renal artery aneurysm associated with fibromuscular dysplasia: management with transarterial embolization.

A 56-year-old woman presented with right-sided flank pain, dizziness, and nausea. Ultrasonography revealed hydronephrosis of the right kidney. CT showed a nodular mass at the ureteropelvic junction. Subsequent CT angiography revealed the nodular mass as a distal aneurysm of the right renal artery compromising the ureteropelvic junction. Selective diagnostic angiography confirmed the diagnosis of a distal renal artery aneurysm. Moreover, angiography incidentally detected fibromuscular dysplasia of both renal arteries. The renal artery aneurysm was then successfully managed by transarterial embolization using detachable bioactive coils.