Ultrasound, MRI may help in diagnosis of placenta accreta spectrum disorder: Study
Placental bulge sign on either prenatal ultrasound or MRI may help diagnose severe PAS warranting hysterectomy rather than conservative management.
USA: Accurate prenatal diagnosis of severe placental accreta spectrum (PAS) disorder by imaging may guide maternal counseling and selection between hysterectomy and uterine-preserving surgery, finds a recent study.
The findings, published in the American Journal of Roentgenology (AJR), suggest the strong performance of placental bulge for the diagnosis of severe PAS on both US and MRI, with potentially relatively stronger performance on MRI. Nonetheless, the interobserver agreement remains suboptimal on both modalities.
On ultrasound and MRI alike, the placental bulge sign represents deeper venous invasion in PAS--the focal area of myometrial-placental bulging beyond the normal uterine contour. Dighe and colleagues' retrospective study included 62 pregnant women (mean age, 33.2 years) with clinically suspected PAS who underwent both ultrasound and MRI. Blinded to final diagnoses, two maternal-fetal medicine specialists for ultrasound and three abdominal radiologists for MRI independently reviewed images for their respective modality. Using intraoperative and pathologic findings, alongside the International Federation of Gynaecology and Obstetrics classification, patients were separated into those with and without severe PAS.
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