Renal Artery Aneurysms: Natural History and Prognosis

Abstract

Eighty-three patients out of 8,525 undergoing renal angiography during the years 1970-1979 were found to have renal artery aneurysm, which in six patients were bilateral and in 11 multiple. This corresponds to an incidence of almost 1% in this group of patients. Sixty-nine patients were treated conservatively and followed for a mean of 4.3 years. At that time nine patients had died. The cause of death was in no case related to the aneurysm. None of the 60 living patients had symptoms which could be related to the aneurysm. Reports of 36,656 autopsies, including most of the sudden deaths occurring in southern Sweden during a ten-year period, were analyzed. Nineteen cases of ruptured arterial aneurysms in the branches of abdominal aorta were found, but in no case were the renal arteries involved. It is concluded that the risk for rupture of a renal artery aneurysm is extremely small. The indications to operate renal artery aneurysms are discussed.

Renal artery aneurysm mimicking a solid parenchymal lesion

“…Appropriate treatment of a renal aneurysm depends on the patient's age, sex and blood pressure as well as the characteristics of the aneurysm, and it is carried out to prevent rupture which is the most feared complication [9]; particularly young pregnant women are at risk of rupture [10]. If the lesion measures less than 20 mm in diameter, is asymptomatic and presents no risk factors for rupture, clinical and instrumental follow-up may be sufficient.…”

Coil Embolization of a Giant Renal Artery Aneurysm

“…While renal artery aneurysms (RAAs) are discovered in as many as 1.0% of patients undergoing abdominal aortic angiography [4], their overall incidence is more rare, occurring in just 0.1% of the general population [1]. While the evaluation for RAAs may be prompted by symptoms such as hematuria, flank pain, or hypertension, the frequency with which asymptomatic RAAs are being discovered as incidental radiologic findings is increasing, owing to more frequent use of magnetic resonance imaging (MRI), computed tomography (CT), and arteriography.…”

Tratamento endovascular de aneurisma da artéria renal por embolização com micromolas preservando o fluxo sangüíneo renal: relato de caso

“…Normalmente, se apresentam como um achado incidental em estudos de imagem realizados para a investigação de outras doenças, especialmente hipertensão. Existe uma associação entre estas duas patologias em 70% dos casos 3 , mas apenas alguns apresentam hipertensão de origem renovascular 4 . Diversas razões são sugeridas para este efeito, entre elas: embolização, compressão extrínseca e tortuosidade da artéria adjacente 5 .…”

“…O tipo fusiforme e as calcificações da parede arterial sugerem proteção contra a ruptura. No entanto, diversas séries não têm demonstrado a correlação entre estas características e o risco de ruptura 4,[8][9][10][11] . O tamanho do aneurisma como parâmetro exclusivo para a indicação do tratamento não deve ser a regra, devendo ser considerado dentro de um contexto que leve em conta a idade do paciente, a presença de sintomas e a hipertensão severa associada, como no caso apresentado.…”