Citation, DOI, disclosures and article data
Citation:
Weerakkody Y, Knipe H, Placental shelf. Reference article, Radiopaedia.org (Accessed on 18 Apr 2024) https://doi.org/10.53347/rID-39899
A placental shelf refers to a ridge of placental tissue freely abutting the margin. It may represent part of a circumvallate placenta, although an early second-trimester placental shelf can be a common, benign and transient finding 1.
Placental shelves detected in early second-trimester are thought to rarely persist to mid-gestation and never to the third trimester.
Radiographic features
Ultrasound
Typically seen as a peripheral uplifted rim of chorionic tissue appearing as an echodense ridge.
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3. Sebire NJ, Sepulveda W. Correlation of placental pathology with prenatal ultrasound findings. J. Clin. Pathol. 2008;61 (12): 1276-84. doi:10.1136/jcp.2008.055251 - Pubmed citation
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4. Harris RD, Wells WA, Black WC et-al. Accuracy of prenatal sonography for detecting circumvallate placenta. AJR Am J Roentgenol. 1997;168 (6): 1603-8. doi:10.2214/ajr.168.6.9168736 - Pubmed citation
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