Renal duplication with ureter duplex not following Meyer-Weigert-Rule with development of a megaureter of the lower ureteral segment due to distal stenosis - A case report
C Darr, U Krafft, A Panic, S Tschirdewahn, B A Hadaschik, C Rehme, C Darr, U Krafft, A Panic, S Tschirdewahn, B A Hadaschik, C Rehme
Abstract
Meyer-Weigert-Rule predicts the draining pattern of duplex ureters in bipolar renal duplications. The upper pole is normally seen as ectopic and therefore dysplastic due to obstruction, whereas the lower pole is related to vesicoureteral reflux. In our case, this rule is violated with uncrossed ureter duplex and a dysplastic lower pole in connection with obstruction.
Keywords: Megaureter; Meyer-weigert-rule; Renal duplication; Ureter duplex.
© 2019 The Authors.
Figures
MRI of the abdomen of a twenty-three-year-old patient born with renal duplication of the left side and ureter duplex. A Megaureter of the lower renal moiety (*). B Normal configurated upper renal moiety (white arrow) with no drain obstruction. C and D demonstrate a different view of the left Megaureter (white arrow) and the normal configurated upper renal moiety (*).
Micturating cystogram (MCU) showing an even delimited bladder without any sign of vesicoureteral reflux.
References
- Esfahani S.A., Close C., Yousefzadeh D.K. Side-to-side and interpolar renal duplications: the nonpolar variety. Int Urol Nephrol. 2013;45(2):333–338.
- Zamani R., Martinez R., Reddy M.P. Duplicated collecting system: not following Weigert-Meyer rule as a result of renal stone obstructing the lower ureteropelvic junction. Clin Nucl Med. 2004;29(6):386–387.
- Jain P., Parelkar S., Shah H., Sanghavi B., Mishra P. Uncrossed complete ureteral duplication with dysplastic lower moiety: a violation of the Weigert-Meyer law. J Pediatr Urol. 2008;4(5):404–406.
- Slaughenhoupt B.L., Mitcheson H.D., Lee D.L. Ureteral duplication with lower pole ectopia to the vas: a case report of an exception to the Weigert-Meyer law. Urology. 1997;49(2):269–271.
- Mishra K., Elliott C.S. A violation of the Weigert-Meyer law – an ectopic ureter arising from the lower renal pole. J Clin Urol. 2017;10(3):202–204.
Source: PubMed