Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Magnetic Resonance Imaging of Placenta Accreta Spectrum: A Step-by-Step Approach

  • Sitthipong Srisajjakul (Division of Diagnostic Radiology, Department of Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University) ;
  • Patcharin Prapaisilp (Division of Diagnostic Radiology, Department of Radiology, Faculty of Medicine Siriraj Hospital, Mahidol University) ;
  • Sirikan Bangchokdee (Department of Internal Medicine, Pratumthani Hospital)
  • Received : 2020.05.04
  • Accepted : 2020.07.29
  • Published : 2021.02.01
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Abstract

Placenta accreta spectrum (PAS) is an abnormal placental adherence or invasion of the myometrium or extrauterine structures. As PAS is primarily staged and managed surgically, imaging can only guide and facilitate diagnosis. But, imaging can aid in preparations for surgical complexity in some cases of PAS. Ultrasound remains the imaging modality of choice; however, magnetic resonance imaging (MRI) is required for evaluation of areas difficult to visualize on ultrasound, and the assessment of the extent of placenta accreta. Numerous MRI features of PAS have been described, including dark intraplacental bands, placental bulge, and placental heterogeneity. Failure to diagnose PAS carries a risk of massive hemorrhage and surgical complications. This article describes a comprehensive, step-by-step approach to diagnostic imaging and its potential pitfalls.

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References

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