Surgical procedures for the construction of VON. a Take a 36-cm-long segment of ileum. b, c A 60-mm stapler is introduced through the first incision to make the caudal horn, followed by a second 60-mm stapler through the second incision for the left horn. d After removal of the central part of the metal suture exceeding the intestinal resection, the afferent and efferent stumps are sutured together with a 60-mm mechanical stapler forming the right lateral horn; the ureter is placed on the same side of the horn, and then the ureteral catheter is reversed through the anterior wall of the neobladder.