 For a successful repair of a PFUDDI it is necessary to identify the specific anatomy of the distraction defect before undertaking any treatment, The classic approach for evaluating a PFUDDI is through Retrograde Urethrography RUG and Voiding cysto-urethrography VCUG, particularly while the patient is attempting to void. However, this study can often give a false interpretation of the exact anatomy of the distraction defect on many occasions15. 