Delayed presentation of posterior urethral valves in discordant twins.
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.
Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104, USA. christmanm@email.chop.edu
Matthew S
MS
Christman
Stephen A
SA
Zderic
Thomas F
TF
Kolon
D002648:Child; D002675:Child, Preschool; D057210:Delayed Diagnosis; D004200:Diseases in Twins / Q000175:diagnosis*; D006801:Humans; D008297:Male; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic; D016216:Ultrasonography, Prenatal; D014521:Urethra / Q000002:abnormalities* / Q000000981:diagnostic imaging*