title: [Diagnostic value of power Doppler ultrasonography for Sirenomelia Seguence in prenatal].
abstract: OBJECTIVE
  To study and discuss the diagnostic value and ultrasonographic characteristics of power doppler ultrasound in the prenatal diagnosis of Sirenomelia Seguence.
  
  
  METHODS
  The abdominal aorta in two fetuses with sirenomelia seguence fetuses and in ten with nomal was reviewed and compared with two-dimensional power doppler ultrasound and three-dimensional power doppler ultrasound in prenatal.
  
  
  RESULTS
  The abdominal aorta were showed to divid into renal arteries in the kidney level while two common iliac arteries in the pelvis in nomal fetuses with two-dimensional power doppler ultrasound and three-dimensional power doppler ultrasound; compared with the nomal, the abdominal aorta and whose branches in sirenomelia seguence were demonstrated as follows: 1) a large and deformed vascular coming from the high abdominal aorta, which was found to act as a umbilical artery by careful examination; 2) no bifurcation of renal arteries identified; 3) no bifurcation of two common iliac arteries identified; 4) the abdominal aorta changing into a narrow vascular after one deformed vascular separating from.
  
  
  CONCLUSIONS
  Sirenomelia seguence fetuses has a characteristic change in two-dimensional power doppler ultrasound and three-dimensional power doppler ultrasound, which is helpful to improve the prenatal diagnosis of sirenomelia seguence.
authors.affiliation: Department of Ultrasonography, West China Second Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Xia-yu
authors.initials: XY
authors.lastname: Yan
authors.forename: Tai-zhu
authors.initials: TZ
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Luo
authors.forename: Yu
authors.initials: Y
authors.lastname: Tian
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
mesh_terms: D004480:Ectromelia / Q000175:diagnosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D011247:Pregnancy; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D016216:Ultrasonography, Prenatal