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Updated: May 25, 2026

Vessel-sparing Excision and Primary Anastomosis
Published on: January 7, 2019
Delayed presentation of posterior urethral valves in discordant twins
Matthew S Christman1, Stephen A Zderic, Thomas F Kolon
1Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA. christmanm@email.chop.edu
Abstract:
Concordant and discordant presentations of posterior urethral valves (PUV) in twins have been described. Twin gestation may complicate the diagnosis of PUV based on prenatal evaluation. A case series of 2 sets of twin births is presented, each of which was discordant for the diagnosis of PUV. A delay in diagnosis occurred in both cases, despite prenatal ultrasound abnormalities. This delay could result from failed sensitivity of prenatal ultrasound or from postnatal evaluation of the incorrect twin. Caution must be exercised during follow-up of abnormalities identified on prenatal ultrasound in diseases in which there are no external distinguishing characteristics.
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