Uretero-Iliac Artery Fistula

Abstract

Uretero-Iliac Artery Fistula: a rare cause of haematuria A 90-year-old male presented to our hospital with a onemonth history of intermittent gross hematuria. He had stage II rectal cancer and received neo-adjuvant concurrent chemoradiotherapy and low anterior resection 5 years ago. Additionally, he was under regular bilateral ureteral catheter replacement due to radiation related ureteral stricture for two years.\r\nDuring examination, there was no abdominal tenderness or flank pain. Urine analysis showed pyuria and hematuria. Abdominal and pelvic computed tomography without contrast medium revealed only bilateralwithout contrast medium revealed only bilateral hydronephrosis. After admission, several hematuria episodes that required blood transfusions and bladder irrigation occurred at an interval of 3 days and resolved spontaneously. Cystoscopy was unmarkable except bleeding from right ureteral orifice during ureteral stent replacement. Concerns for a ureteral arterial fistula prompted an angiogram, which later on proved the existence of a fistula with pseudoaneurysm(Figure 1) between external iliac and distal right ureter(Figure 1). A stent graft was placed from the common iliac into the right external iliac artery. After stent-graft deployment, the aneurysm is no longer opacified. At the 2-month follow-up, no hematuria recurrence was detected.\r\n