Anuradha Samir Shenoy-Bhangle MD, Presenter: Nothing to Disclose

Debra Ann Gervais MD, Abstract Co-Author: Research Grant, Covidien AG

Susanna I. Lee MD, PhD, Abstract Co-Author: Nothing to Disclose

1. MRI is indicated in patients with equivocal or suspected ultrasound diagnosis of abnormal placentation for confirmation and surgical planning 2. Exam should be performed between 23 to 30 weeks of gestation, without intravenous contrast and with a radiologist monitoring image acquisition 3. Diagnostic features are rounded placental margins, intraplacental T2 hypointense bands and uterine bulging (accreta/increta) and disruption of myometrial wall (percreta) 4. Report should include diagnosis (percreta vs. accreta/increta vs. negative), identification of the adjacent involved organs, placental location and a description of the previa.

Introduction Definition of abnormal placentation variants Demographics Management issues Indications for MRI Exam performance Timing relative to gestation Image acquisition protocol Image interpretation – 16 pathologically confirmed cases with diagnostic features Normal - 30 weeks Suspicious on ultrasound but negative on MRI Accreta/increta – obvious and subtle Percreta – invasion into bowel, bladder, abdominal wall muscle Reporting Diagnosis – test sensitivity and specificity Features relevant to treatment planning Other possible incidental findings relevant to obstetrical management

http://abstract.rsna.org/uploads/2014/14010503/14010503_6bzj.pdf

Shenoy-Bhangle, A, Gervais, D, Lee, S, MRI of Placenta Accreta, Increta and Percreta: What the Radiologist Needs to Know.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14010503.html