Placenta: Difference between revisions
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File:Histopathology of fibrinoid necrosis of the placenta.jpg|Villous '''[[Fibrinoid necrosis of the placenta|fibrinoid necrosis]]'''. Only needs mention when severe {{Comprehensive-begin}}or moderate{{Comprehensive-end}}. | File:Histopathology of fibrinoid necrosis of the placenta.jpg|Villous '''[[Fibrinoid necrosis of the placenta|fibrinoid necrosis]]'''. Only needs mention when severe {{Comprehensive-begin}}or moderate{{Comprehensive-end}}. | ||
File:Histopathology of chorangiosis.jpg|'''Chorangiosis''', an abundance of blood vessels within the chorionic villi. | File:Histopathology of chorangiosis.jpg|'''Chorangiosis''', an abundance of blood vessels within the chorionic villi. | ||
File:Histopathology of placenta with increased syncytial knotting of chorionic villi, annotated.jpg|Increased syncytial knotting of chorionic villi, with two knots pointed out. Causes include both hypoxia and hyperoxia.<ref name="pmid17140657">{{cite journal| author=Heazell AE, Moll SJ, Jones CJ, Baker PN, Crocker IP| title=Formation of syncytial knots is increased by hyperoxia, hypoxia and reactive oxygen species. | journal=Placenta | year= 2007 | volume= 28 Suppl A | issue= | pages= S33-40 | pmid=17140657 | doi=10.1016/j.placenta.2006.10.007 | pmc= | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=17140657 }} </ref> | |||
</gallery> | </gallery> | ||
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Mild to moderate inflammation in the decidua alone can be ignored (as it is most commonly a physiological response and doesn't have a clinical significance for the fetus). | Mild to moderate inflammation in the decidua alone can be ignored (as it is most commonly a physiological response and doesn't have a clinical significance for the fetus). | ||
Example in a '''twin''' placenta: | |||
{|class=wikitable | |||
| Twin placenta, Caesarean section: | |||
*Third trimester dichorionic, diamniotic twin placenta. | |||
*Villous morphology histologically appropriate for gestational age. | |||
*Placental weight approximately 25th percentile for gestational age. | |||
*Two three-vessel umbilical cords. | |||
*Negative for chorioamnionitis and funisitis. | |||
|} | |||
<noinclude>{{Bottom}}</noinclude> | <noinclude>{{Bottom}}</noinclude> | ||