title: Single umbilical artery and associated hydronephrosis: a report of 2 cases.
abstract: BACKGROUND
  A single umbilical artery (SUA) in a fetus may be associated with hydronephrosis.
  
  
  METHODS
  We describe 2 cases of SUA, one of which had severe hydronephrosis with ascites and was stillborn. The other case was born alive with a unilateral hydroureter and is being managed with close monitoring.
  
  
  CONCLUSIONS
  Detection of SUA on antenatal ultrasound should prompt a careful search for urinary tract abnormalities, as associated severe hydronephrosis may lead to a poor outcome.
authors.affiliation: Department of Anatomic Pathology, Children's Hospital, and Urological Associates, Inc., Columbus, Ohio 43205, USA. drsinghv@rediffmail.com
authors.forename: Vivekanand
authors.initials: V
authors.lastname: Singh
authors.forename: Rashmi
authors.initials: R
authors.lastname: Patel
authors.forename: Pramila
authors.initials: P
authors.lastname: Pradhan
mesh_terms: D000328:Adult; D005260:Female; D005315:Fetal Diseases / Q000000981:diagnostic imaging*; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D006869:Hydronephrosis / Q000151:congenital* / Q000000981:diagnostic imaging; D007231:Infant, Newborn; D007668:Kidney / Q000002:abnormalities; D011247:Pregnancy; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000002:abnormalities* / Q000000981:diagnostic imaging