title: Conventional MRI features for predicting the clinical outcome of patients with invasive placenta.
abstract: OBJECTIVE
  We aimed to evaluate whether morphologic magnetic resonance imaging (MRI) features could help to predict the maternal outcome after uterine artery embolization (UAE)-assisted cesarean section (CS) in patients with invasive placenta previa.
  
  
  METHODS
  We retrospectively reviewed the MRI data of 40 pregnant women who have undergone UAE-assisted cesarean section due to suspected high risk of massive hemorrhage caused by invasive placenta previa. Patients were divided into two groups based on the maternal outcome (good-outcome group: minor hemorrhage and uterus preserved; poor-outcome group: significant hemorrhage or emergency hysterectomy). Morphologic MRI features were compared between the two groups. Multivariate logistic regression analysis was used to identify the most valuable variables, and predictive value of the identified risk factor was determined.
  
  
  RESULTS
  Low signal intensity bands on T2-weighted imaging (P < 0.001), placenta percreta (P = 0.011), and placental cervical protrusion sign (P = 0.002) were more frequently observed in patients with poor outcome. Low signal intensity bands on T2-weighted imaging was the only significant predictor of poor maternal outcome in multivariate analysis (P = 0.020; odds ratio, 14.79), with 81.3% sensitivity and 84.3% specificity.
  
  
  CONCLUSIONS
  Low signal intensity bands on T2-weighted imaging might be a predictor of poor maternal outcome after UAE-assisted cesarean section in patients with invasive placenta previa.
authors.affiliation: Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing, China. shihb@njmu.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Chen
authors.forename: Xiao Quan
authors.initials: XQ
authors.lastname: Xu
authors.forename: Hai Bin
authors.initials: HB
authors.lastname: Shi
authors.forename: Zheng Qiang
authors.initials: ZQ
authors.lastname: Yang
authors.forename: Xin
authors.initials: X
authors.lastname: Zhou
authors.forename: Yi
authors.initials: Y
authors.lastname: Pan
mesh_terms: D000328:Adult; D002585:Cesarean Section / Q000379:methods*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010920:Placenta / Q000000981:diagnostic imaging*; D010923:Placenta Previa / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D011237:Predictive Value of Tests; D011247:Pregnancy; D012189:Retrospective Studies; D012307:Risk Factors; D016896:Treatment Outcome; D016216:Ultrasonography, Prenatal; D055357:Uterine Artery Embolization; D014592:Uterine Hemorrhage / Q000517:prevention & control* / Q000601:surgery