Zonary placenta

Last revised by David Luong on 6 Feb 2022

Citation, DOI, disclosures and article data

Citation:

Weerakkody Y, Luong D, Zonary placenta. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-92241

DOI:

https://doi.org/10.53347/rID-92241

Permalink:

https://radiopaedia.org/articles/92241

rID:

92241

Article created:

17 Aug 2021, Yuranga Weerakkody ◉

Disclosures:

At the time the article was created Yuranga Weerakkody had no recorded disclosures.

View Yuranga Weerakkody's current disclosures

Last revised:

6 Feb 2022, David Luong ◉

Disclosures:

At the time the article was last revised David Luong had no recorded disclosures.

View David Luong's current disclosures

Revisions:

3 times, by 2 contributors - see full revision history and disclosures

Synonyms:

Ring shaped placenta
Annular placenta

A zonary placenta also known as a ring-shaped placenta or annular placenta is an extremely rare variation in placental morphology where the placenta can appear as an annular ring. It can be a complete ring of placental tissue, but more often, tissue atrophy to part of the ring can result in a horseshoe shape placenta.