Treatment of ureteroarterial fistulae with covered vascular endoprostheses and ureteral occlusion
Bilbao JI, Cosín O, Bastarrika G, Rosell D, Martínez-Cuesta A.
Department of Radiology, Clínica Universitaria de Navarra, Universidad de Navarra, Avenida de Pio XII 36, 31008 Pamplona, Spain.
Ureteroarterial fistulae (UAFs) are a rare entity, often difficult to identify, and associated with a high mortality rate. This fact has been attributed to a delay in diagnosis and treatment. Five conditions that can predispose to the development of this uncommon entity have been described: prior pelvic surgery, prolonged ureteral stenting, radiation therapy, previous vascular surgery and vascular pathology.
We present 4 patients with UAFs and at least three of the above-mentioned conditions. Ureteral ischemia and subsequent necrosis promote the formation of these fistulae. The constant pulsation of the iliac artery is transmitted to an already compromised ureter containing a stiff intraluminal foreign body, resulting in pressure necrosis, most likely where the ureter crosses the iliac artery.
RESULTS AND CONCLUSION
Cases were managed percutaneously with a combination of the deployment of a covered prosthesis and, when needed, with mechanical occlusion of the ureter. Hematuria stopped in all the patients with no evidence of immediate rebleeding. One patient presented a new episode of vaginal bleeding 13 months after endograft placement and ureteral embolization.
Arteriography showed the presence of a hypogastric artery pseudoaneurysm that was occluded using coils. No new bleeding has occurred in this patient 12 months after the second embolization. At present all 4 patients are alive with follow-up periods of 5, 9, 11 and 25 months since the first procedure.
CITATION Cardiovasc Intervent Radiol. 2005 Mar-Apr;28(2):159-63