Placental fusion
Citation, DOI, disclosures and article data
Citation:
Radswiki T, Jones J, Weerakkody Y, Placental fusion. Reference article, Radiopaedia.org (Accessed on 22 Mar 2025) https://doi.org/10.53347/rID-15450
rID:
15450
Article created:
18 Oct 2011,
The Radswiki ◉
Disclosures:
At the time the article was created The Radswiki had no recorded disclosures.
View The Radswiki's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Jeremy Jones had no recorded disclosures.
View Jeremy Jones's current disclosures
Revisions:
2 times, by
2 contributors -
see full revision history and disclosures
Systems:
Synonyms:
- Fusion of placentas
- Fusion of placenta
Placental fusion is a phenomenon that can occur in a twin pregnancy. This can occur to varying degrees. Determination of chorionicity on ultrasound can sometimes be difficult if there has been a placental fusion.
In a DCDA pregnancy, there are no vascular anastomoses between the twin placentae and with an equator marking a zone of disc fusion where there is a narrow band at the equator where chorionic vessels do not cross 4.
In a MCDA pregnancy, multiple vascular anastomoses are usually present making the junction less distinct with examples of arterial to venous, arterial to arterial, or venous to venous connections being evident 4.
References
- 1. Baergen RN, Benirschke K. Manual of Pathology of the Human Placenta. Springer Verlag. (2010) ISBN:1441974938. Read it at Google Books - Find it at Amazon
- 2. Baldwin VJ. Pathology of multiple pregnancy. Springer. (1994) ISBN:0387940111. Read it at Google Books - Find it at Amazon
- 3. Faye-Petersen OM, Heller DS, Joshi VV. Handbook of placental pathology. Informa Healthcare. (2006) ISBN:1842142321. Read it at Google Books - Find it at Amazon
- 4. Histopathological examination of the placenta in twin pregnancies. (2018) APMIS. 126 (7): 626. doi:10.1111/apm.12829 - Pubmed
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