title: Posterior urethral valve: transperineal US for imaging and diagnosis in male infants.
abstract: OBJECTIVE
  To compare routine pelvic and transperineal scanning in the ultrasonographic (US) diagnosis of posterior urethral valve (PUV).
  
  
  METHODS
  Longitudinal and transverse transperineal views were obtained in addition to routine renal and transvesicle views in the prospective US evaluation of 10 male infants (aged 2 days to 6 weeks) clinically suspected of having PUV. High-frequency (5.0- and 7.5-MHz) transducers were used.
  
  
  RESULTS
  Five of the boys proved to have PUV. Each had urethral dilation clearly imaged at transperineal US. Only two of these boys had urethral dilatation imaged with the transvesicle approach. In three of the boys, a linear area of echogenicity, consistent with a valve, was imaged, but only with the transperineal approach. The other five boys had no urethral dilatation noted at transperineal or transvesicle US and proved to not have PUV.
  
  
  CONCLUSIONS
  Transperineal imaging can aid in the diagnosis of PUV at US. Transperineal US may enable imaging of the valve itself.
authors.affiliation: Department of Radiology, State University of New York-Health Science Center, Brooklyn, NY 11203.
authors.forename: H L
authors.initials: HL
authors.lastname: Cohen
authors.forename: M
authors.initials: M
authors.lastname: Susman
authors.forename: J O
authors.initials: JO
authors.lastname: Haller
authors.forename: K I
authors.initials: KI
authors.lastname: Glassberg
authors.forename: M A
authors.initials: MA
authors.lastname: Shapiro
authors.forename: D L
authors.initials: DL
authors.lastname: Zinn
mesh_terms: D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D004108:Dilatation, Pathologic / Q000000981:diagnostic imaging; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011446:Prospective Studies; D014463:Ultrasonography / Q000379:methods; D014521:Urethra / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D014524:Urethral Obstruction / Q000000981:diagnostic imaging / Q000209:etiology