“…The etiology of such a fistula is mostly iatrogenic, including pelvic malignancy, previous vascular or pelvic surgery, radiotherapy, ureterolithiasis, diverting urinary conduit construction, infection, and indwelling ureteral stents 2. Primary uretero-iliac fistula caused by aortoiliac aneurysm and arteriovenous malformation only constitutes 15% of all such fistulas 3. We describe a dramatic case with recurrent hematuria even after undergoing transplant nephrectomy and radical nephrectomy because of renal allograft rejection with combined renal cell carcinoma (RCC), which finally turned out to be an external iliac vein – transplant ureteral fistula.…”