Ultrasonic diagnosis of duplication of renal pelvis and ureter malformation

Objective To study the value of ultrasonic imaging technique in diagnosis of duplication of renal pelvis and ureter malformation. Methods The ultrasonic diagnosis of 25 cases with duplication of renal pelvis and ureter (male 14, female 11, aged 7 ～88 years, mean age 39.7 years) were analyzed retrospectively. Results Of these patients, 8 cases were confirmed by intravenous urography, 15 cases by magnetic resonance urography, 10 cases by operation , and the other 2 cases were found in donors for transplantation duringnephrectomy. All ofthe 25 cases were unilateral duplication disorder. In this studythe ultrasonic diagnosis rate for duplication of renal pelvis and ureter was 84 %(21/25). Conclusion Ultrasonic approach is the first choice in diagnosis of duplication of renal pelvis and ureter, color Doppler imaging is not only paying an important role in observing the renal hilus blood vessels but also in observing of urine spraying from ureter to bladder for showing the exact location of ectopic ureter opening.