Renal artery aneurysms in solitary kidney of woman with potentiality of pregnancy.

Although renal artery aneurysms in solitary kidney are rare, we encountered a case of congenital solitary kidney with noncalcified renal artery aneurysm. The patient was twenty-four years' old and wanted to become pregnant. We treated her by surgical methods. The operative procedure, aneurysmectomy and ligatures of the influx and exflux vessels of the aneurysm, was performed by a transaneurysmal approach. Ultrasound tomography during surgery was convenient to detect the intrarenal aneurysm. The postoperative course was uneventful apart from a transient increase of serum creatinine and blood urea nitrogen. The advisability of surgical methods for aneurysms in solitary kidneys and the implications in pregnancy are discussed.