In this paper the clinical condition of two male patients, aged 58 and 65 years are presented, after being admitted as a consequence of a rare complication of an inflammatory aneurysm of the abdominal aorta, which is an ureteral compression, with hydronephrosis, anuria and acute renal failure. After having an urgent haemodialysis session, the etiology of the process was diagnosed by echography and abdominal CT-scans, followed by ureteral catheterization, restoration of diuresis and normalization of renal function. Conventional surgery was performed later, in elective conditions, and the post operative course was normal, without complications. The main features of this clinical entity, its diagnosis and multidisciplinary management are presented and discussed.