A proposal for standardized magnetic resonance imaging (MRI) descriptors of abnormally invasive placenta (AIP) - From the International Society for AIP

Diagn Interv Imaging. 2019 Jun;100(6):319-325. doi: 10.1016/j.diii.2019.02.004. Epub 2019 Mar 8.


Abnormally invasive placenta (AIP) is used to describe a placenta that does not separate naturally after delivery and cannot be extirpated without causing abnormally high blood loss. Recently, the use of a standardized terminology for descriptors of AIP signs seen on ultrasound has been prosed but to date no such unified descriptors have been developed for magnetic resonance imaging (MRI). The purpose of this paper is to propose a unified terminology based on a consensus opinion from the members of the International Society for AIP (IS-AIP) that include obstetricians, gynecologists, radiologists, pathologists, anesthesiologists and basic science researchers. We assume that using these standardized MRI descriptors for AIP will be useful for clinical use, education, teaching and future research projects, thus assumably improving care of patients with this condition. In addition, using a uniform terminology for AIP should become the first step of a standardized MRI report.

Keywords: Abnormally invasive placenta (AIP); International Society for AIP; Magnetic resonance imaging (MRI).

Publication types

  • Practice Guideline

MeSH terms

  • Female
  • Humans
  • Magnetic Resonance Imaging / standards*
  • Placenta Diseases / diagnostic imaging*
  • Pregnancy
  • Terminology as Topic*