Placenta Accreta: Spectrum of US and MR Imaging Findings
Abstract
Placenta accreta (PA) encompasses various types of abnormal placentation in which chorionic villi attach directly to or invade the myometrium. PA is a significant cause of maternal morbidity and mortality and is now the most common reason for emergent postpartum hysterectomy. Its prevalence has risen tenfold in the United States over the past 50 years, primarily due to the increasing percentage of pregnant patients undergoing primary and repeat cesarean sections. Placenta previa and previous cesarean section are the two most important known risk factors for PA. Accurate prenatal identification of affected pregnancies allows optimal obstetric management. Ultrasonography (US) remains the diagnostic standard, and routine US examination at 18-20 weeks gestation affords an ideal opportunity to screen for the disorder. Placental lacunae and abnormal color Doppler imaging patterns are the most helpful US markers for PA. In recent years, there has been increased interest in magnetic resonance (MR) imaging for the evaluation of PA, since it can provide information on depth of invasion and more clearly depict posterior placentas. The most reliable MR imaging findings are uterine bulging, heterogeneous placenta, and placental bands. Focal interruptions in the hypointense myometrial border may also be helpful. PA is a clinical and diagnostic challenge that is being encountered with increasing frequency. Clinicians should be aware of the clinical issues, risk factors, and imaging findings…
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Villous adhesion or invasion is rarely evenly distributed in the myometrium, thereby limiting the accuracy of examination.
“Villous adhesion or invasion is rarely evenly distributed in the myometrium, thereby limiting the accuracy of examination [10,12]”
From An effective and non-invasive prediction model for placenta accreta spectrum early diagnosis: Ultrasound image-based novel deep learning network (2026) · cites this paper as [12]
The clinical diagnosis of PAS can be made only by sampling through surgery or delivery.
“the clinical diagnosis of PAS can be made only by sampling through surgery or delivery. [9-12]”
From An effective and non-invasive prediction model for placenta accreta spectrum early diagnosis: Ultrasound image-based novel deep learning network (2026) · cites this paper as [12]
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- Authors
- Baughman, W. C., Corteville, J. E., & Shah, R. R.
- Affiliations
- MetroHealth Medical Center (US)
- Venue
- RadioGraphics
- Published
- 2008-11
- Volume
- 28
- Issue
- 7
- Pages
- 1905-1916
- ISSN
- 0271-5333 (ISSN-L)
- 1527-1323
- OpenAlex
- W2116740233
- Cited by
- 341
- References
- 1
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 12 · 2023: 21 · 2022: 32 · 2021: 32 · 2020: 28 · 2019: 19 · 2018: 34 · 2017: 13 · 2016: 18 · 2015: 20 · 2014: 19 · 2013: 23 · 2012: 16
- FWCI
- 12.49
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Radiographics (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Maternal and fetal healthcare
- Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
- Health Sciences › Medicine › Obstetrics and Gynecology › Uterine Myomas and Treatments
- Keywords
- placenta accreta, placenta accreta spectrum, abnormal placentation, prenatal diagnosis, placental lacunae, color Doppler ultrasound, MRI findings, placenta previa, previous cesarean section, maternal morbidity, postpartum hysterectomy, risk factors
- MeSH terms
- Female, Humans, Magnetic Resonance Imaging, Placenta Accreta, Pregnancy, Ultrasonography
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