Abstract
Ureteral duplication is a developmental anomaly leading to many complications in children. The Weigert-Meyer law states that ‘In a complete ureteral duplication, the ureter whose orifice is more medial and caudal reaches the upper moiety and the other ureter whose orifice is more lateral and cephalad reaches the lower renal moiety’. This law has been observed universally in cases of ureteral duplication. The possible complications of double ureter and duplex system include obstruction, lithiasis, ureterocele and vesico-ureteral reflux. Hence it is important to recognize this entity for early intervention and to prevent complications. We are publishing one such rare case in a 10 month old child with review of literature.
Highlights
The Weigert-Meyer law was given the name following discovery by Carl Weigert and later Meyer
The cortical function of the upper moiety of the right kidney was significantly reduced (7%) while the lower moiety of the right kidney showed good cortical function (93%)
It is reported that this condition is seen in females more commonly with the female to male ratio of 6:1.[2]. In such cases of duplex kidney with double ureter, the lower moiety is most commonly affected by vesico-ureteral obstruction and reflux, whereas the upper moiety is most commonly affected by hydronephrosis
Summary
The Weigert-Meyer law was given the name following discovery by Carl Weigert and later Meyer. The distal opening of the dilated right ureter was seen beyond the urinary bladder likely in the vestibule of the vagina or the urethra. MRI Urography showed a duplex kidney on the right side with duplication of the renal calyces, pelvis and the entire ureters.
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