Mycotic Aneurysm of Abdominal Aorta Causing the Right Renal Arterial Stenosis: Case Report

Mycotic aneurysm of the abdominal aorta is a rare disease. Despite intensive antibiotic therapy, rupture leads to a high mortality rate, so early diagnosis and treatment is very important. Rupture is the most common complication of abdominal aortic aneurysm, while renal artery stenosis is very rare. We report the radiologic findings of mycotic aneurysm of the suprarenal abdominal aorta leading to right renal artery stenosis induced by mass effect and renovascular hypertension.

Detection of Segmental Branch Renal Artery Stenosis by Doppler US: A Case Report

In stenosis of a segmental branch or among multiple renal arteries, Doppler sampling of intrarenal arteries in the upper, mid and lower poles demonstrates strikingly different waveform patterns that might otherwise be overlooked. We report a case of segmental branch renal artery stenosis in which a pulsus parvus et tardus waveform was observed in a segmental branch of a renal artery. In this case, systematic analysis of Doppler waveforms of intrarenal arteries at more than three different locations facilitated a rapid and confident diagnosis of seg-mental branch renal artery stenosis.

Diagnosis of Renal Artery Stenosis; Spiral CTA vs. IA-DSA

PURPOSE: To evaluate the accuracy of spiral CT angiography(CTA) in the demonstration of accessory or multiplerenal arteries and renal artery stenosis. MATERIALS AND METHODS: We prospectively performed CTA in 50 patients(24 males and 26 females) between nine and 77 years old (mean 39.3) in whom renovascular hypertension was suspected (n=32), or who were potential renal donors (n=18). Within two days of CTA, intraarterial digital subtraction angiography (IA-DSA) was performed. Both spiral CTA and IA-DSA images were blindly compared by two radiologists with respect to the number of accessory renal arteries and the location and severity of renal arterystenosis. The severity of renal arterial stenosis was graded with a five-point scale (grades 0-4). RESULTS: CTA demonstrated 26 of total 27 accessory renal arteries (detection rate = 96.5 %). For the diagnosis of grade 2-4stenosis (> or = 50% stenosis) (n=40 of a total of 127 renal arteries), the sensitivity, specificity, and accuracy of CTA were 90%, 96.5%, and 94.5%, respectively. For the detection of grade 3-4 stenoses (> or = 75% stenosis) (n=33), the sensitivity, specificity, and accuracy of CTA were 87.9%, 98.9%, and 96.1%, respectively. For the detection ofgrade 3-4 stenoses in the main renal artery (n=27), the sensitivity, specificity, and accuracy of CTA were 96.3%,100%, and 99.0%, respectively. CONCLUSION: Spiral CTA is a reliable and accurate screening modality for the evaluation of renal artery in patients suspected to be suffering from renovascular hypertension, or who arepotential renal donors.