title: Accuracy of ultrasound in antenatal diagnosis of placental attachment disorders.
abstract: OBJECTIVE
  To evaluate the accuracy of ultrasound in the diagnosis of placenta accreta and its variants, and to assess the impact of prenatal diagnosis in our population.
  
  
  METHODS
  A total of 314 women with placenta previa were enrolled prospectively and underwent transabdominal and transvaginal ultrasound examinations. An ultrasound diagnosis (grayscale and color/power Doppler) of placental attachment disorder (PAD) was based on the detection of at least two of the following ('two-criteria system'): loss/irregularity of the retroplacental clear zone, thinning/interruption of the uterine serosa-bladder wall interface, turbulent placental lacunae with high velocity flow, myometrial thickness < 1 mm, increased vascularity of the uterine serosa-bladder wall interface, loss of vascular arch parallel to the basal plate and/or irregular intraplacental vascularization. Definitive diagnosis was made at delivery by Cesarean section. Maternal outcome in cases diagnosed antenatally was compared with that in cases diagnosed at delivery.
  
  
  RESULTS
  There were 37/314 cases of PAD (29 anterior and eight posterior). The two-criteria system identified 30 cases of placenta accreta, providing a sensitivity of 81.1% and specificity of 98.9%. When anterior and posterior placentae were considered separately, the detection rates of PAD were 89.7 and 50.0%, respectIvely. Maternal outcome was better in women with prenatal diagnosis of PAD, as seen by less blood loss and shorter hospitalization.
  
  
  CONCLUSIONS
  Our data confirmed that grayscale and color Doppler ultrasound have good performance in the diagnosis of PAD and that prenatal diagnosis improves maternal outcome. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Pilloni
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: M G
authors.initials: MG
authors.lastname: Alemanno
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Gaglioti
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Sciarrone
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Garofalo
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Biolcati
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Botta
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Viora
authors.affiliation: Department of Obstetrics and Gynecology, University of Turin, Sant' Anna Hospital, Turin, Italy.
authors.forename: T
authors.initials: T
authors.lastname: Todros
mesh_terms: D000328:Adult; D002585:Cesarean Section; D005260:Female; D006801:Humans; D017063:Outcome Assessment, Health Care; D010920:Placenta / Q000000981:diagnostic imaging / Q000473:pathology; D010921:Placenta Accreta / Q000000981:diagnostic imaging* / Q000473:pathology; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D018615:Ultrasonography, Doppler, Color / Q000379:methods; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014599:Uterus / Q000000981:diagnostic imaging / Q000473:pathology
keywords: placenta accreta; placenta previa; placental attachment disorders; ultrasound