Each uroradiologic procedure performed in the pre- and postoperative evaluation of the child undergoing undiversion contributes unique information. Function and anatomy of both the upper and lower urinary tracts must be carefully assessed. If the immediate postoperative studies show that the undiversion has been successful, the patient should be monitored yearly with excretory urography. If urinary tract symptoms develop, a more extensive radiographic evaluation (voiding cystourethrography, excretory urography, scintigraphy) may be warranted.