title: [Diagnostic value of magnetic resonance imaging in special-site ectopic pregnancy].
abstract: OBJECTIVE
  To explore the magnetic resonance imaging (MRI) features and diagnostic value of special-site ectopic pregnancy.
  
  
  METHODS
  The MRI features of special-site ectopic pregnancy on 39 pathologically confirmed cases were retrospectively analyzed. All cases received ultrasonic inspection, MRI plain scan and 11 cases underwent enhanced scan.
  
  
  RESULTS
  In 39 cases, there were 3 cases of interstitial tubal pregnancy (n = 3), cornual pregnancy (n = 8) and uterine scar pregnancy (n = 28). The accuracy rates of location and diagnosis were 94.9% and 82.1% respectively. And they were both higher than the rates of ultrasound. They were classified into two groups by clinical outcomes:pregnancy and miscarriage. In 22 cases of pregnancy, there were sac in sac (n = 9) and complete fertilized egg (n = 13). In 17 cases of miscarriage, there were irregular honeycomb (n = 7), ring (n = 6) and mass (n = 4). Among 11 enhanced cases, there were significant enhancement (n = 4), flake or cord-like enhancement (n = 5), a little strengthen on edge (n = 1) and no enhancement (n = 1). The group had intrauterine decidual tissue hyperplasia (n = 22), ovarian cyst (n = 8), pelvic fluid (n = 6), adenomyosis (n = 3), fibroid (n = 2), endometriosis in pelvic and abdominal wall scar area (n = 1) and mild hydrops in right kidney and ureter (n = 1).
  
  
  CONCLUSIONS
  The MRI features of special-site ectopic pregnancy are characteristic and important for clinical treatment.
authors.affiliation: Department of Radiology, Yuying Children's Hospital, Wenzhou Medical College, Wenzhou 325027, China.
authors.forename: Bi-dong
authors.initials: BD
authors.lastname: Fang
authors.forename: Mei-kui
authors.initials: MK
authors.lastname: Chen
authors.forename: Qing-dong
authors.initials: QD
authors.lastname: Yao
authors.forename: Chong-yong
authors.initials: CY
authors.lastname: Xu
authors.forename: Zhi-han
authors.initials: ZH
authors.lastname: Yan
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis*; D012189:Retrospective Studies; D055815:Young Adult