Duplex renal systems are common congenital anomalies having a female preponderance with an estimated prevalence ranging between 0.3% and 6% of the pediatric population. Here, a rare case of duplex anomaly in an infant is presented with its diagnostic challenges and management.
 Weigert C. Ueber einige Bildungsfehler der Ureteren. Archiv f Pathol Anat. 1877;70; 490–501.
 Meyer R. Normal and abnormal development of the ureter in the human embryo; a mechanistic consideration. Anat Rec. 1946;96(4):355-71.
 Iaquinto M, De Castro R, Scarpa MG et al. Incomplete duplex renal system with severe obstruction at the uretero-ureteral junction and minor obstruction at the common stemvesical junction: Challenging diagnosis and conclusive laparoscopic treatment. Pediatr Urol Case Rep. 2020; 7(4):88-93.
 Kulkarni AA, Gupta A, Kothari P et al. Undetected duplex moiety with ureteropelvic junction obstruction: A case report. Pediatr Urol Case Rep. 2018; 5(1):5- 8.
 Huang CJ. Congenital giant megaureter. J Pediatr Surg. 1987;22(3):235-39.
 Chwalle R. The process of formation of cystic dilatations of the vesical end of the ureter and of diverticula at the ureteral ostium. Urol Cutan Rev. 1927; 31:499-504.
 Khrichenko D, Darge K. Functional analysis in MR urography - made simple. Pediatr Radiol. 2010;40(2):182-99.