Ureteric obstruction of solitary kidneys by aneurysms of the iliac artery.

Two rare cases are reported, both known to have solitary kidneys, that had ureteric obstruction caused by iliac artery aneurysms. Iliac aneurysms have a high mortality and may present to the urologist as an uncommon cause of ureteric obstruction. When the ureter of a solitary kidney is obstructed it is recommended that both ureterolysis and a temporary proximal diversion be performed. A common iliac aneurysm should be excised and grafted where possible; an internal iliac aneurysm is best treated by simple ligation or partial excision only.