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KMID : 0880420210220020198
Korean Journal of Radiology
2021 Volume.22 No. 2 p.198 ~ p.212
Magnetic Resonance Imaging of Placenta Accreta Spectrum: A Step-by-Step Approach
Srisajjakul Sitthipong

Prapaisilp Patcharin
Bangchokdee Sirikan
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.
KEYWORD
Magnetic resonance imaging, MRI of placenta, Placenta accreta spectrum, Step-by-step diagnostic imaging approach
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