Figure 1From: Minimally invasive treatment of urinary fistulas using N-butyl-2-cyanoacrylate: a valid first line option Treatment of case n. 4. A) retrograde pyelography revealing perirenal extravasation of contrast medium after robot assisted enucleoresection of RCC. B) An open-end 5 F Cobra catheter is advanced in the middle calyx in preparation for embolization of the calyceal fistula. C) Retrograde contrast injection following embolization with cyanoacrylate.Back to article page