Ultrasound and MRI help diagnose placenta accreta

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According to an open access article by the Editor Editor at ARRS ‘ American Journal of Roentgenology (AJR), an accurate prenatal diagnosis of severe placental accretion (PAS) disorder using imaging could help guide maternal counseling and selection between hysterectomy and uterine preservation surgery.

“The findings suggest a strong placental protrusion performance in the diagnosis of severe PAS by both ultrasound and magnetic resonance imaging, with a potentially relatively stronger performance on magnetic resonance imaging,” wrote the corresponding author Manjiri Dighe of the radiology department of the University of Washington School of Medicine. “Still, the interobserver agreement remains poor in both modalities.”

By both ultrasound and magnetic resonance imaging, the sign of placental bulge represents a deeper venous invasion in PAS, the focal area of ​​the myometrial placental bulge beyond the normal uterine contour. The retrospective study by Dighe and colleagues included 62 (mean age, 33.2 years) with a clinical suspicion of PAS who underwent ultrasound and magnetic resonance imaging. Blinded until the final diagnoses, two specialists in maternal-fetal medicine on ultrasound and three abdominal radiologists on magnetic resonance imaging independently reviewed the images of their respective modality. Through intraoperative and pathological findings, along with the classification of the International Federation of Gynecology and Obstetrics, patients were separated into those with and without severe PAS.

“In the diagnosis of severe PAS,” Dighe et al. it was noted that “the sign of placental protuberance achieved an ultrasound accuracy of 85.5%, a sensitivity of 91.7% and a specificity of 76.9%, and an MRI of an accuracy of 90.3 %, the sensitivity of 94.4% and the specificity of 84.6% “. Ultimately, placental bulge was an independent predictor of severe PAS by ultrasound (odds ratio = 8.94) and magnetic resonance imaging (odds ratio = 45.67).

“Placental start a prenatal session or MRI may help diagnose a severe PAS that guarantees hysterectomy rather than conservative treatment, ”the authors of this AJR article concluded.


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More information:
Shanigarn Thiravit et al, Role of ultrasound and magnetic resonance imaging in the diagnosis of severe accreted placental spectrum disorder: an intraindividual assessment with emphasis on placental protrusion, American Journal of Roentgenology (2021). DOI: 10.2214 / AJR.21.25581

Citation: Ultrasound, magnetic resonance imaging, aid in the diagnosis of placenta accreta (2021, May 27) retrieved May 27, 2021 from https://medicalxpress.com/news/2021-05-ultrasound-mri-aid-placenta-accreta .html

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