Difference between revisions of "Placenta"

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Placenta (view source)

Revision as of 15:21, 17 April 2016

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==Amnion nodosum==
==Amnion nodosum==
===General===
{{Main|Amnion nodosum}}
*Associated with (long-standing) [[oligohydramnios]].<ref>URL: [http://library.med.utah.edu/WebPath/PLACHTML/PLAC042.html http://library.med.utah.edu/WebPath/PLACHTML/PLAC042.html]. Accessed on: 12 January 2011.</ref>
*Should be separated from ''squamous metaplasia of amnion''.
 
===Gross===
Features:<ref name=pmid18081444>{{Cite journal  | last1 = Adeniran | first1 = AJ. | last2 = Stanek | first2 = J. | title = Amnion nodosum revisited: clinicopathologic and placental correlations. | journal = Arch Pathol Lab Med | volume = 131 | issue = 12 | pages = 1829-33 | month = Dec | year = 2007 | doi = 10.1043/1543-2165(2007)131[1829:ANRCAP]2.0.CO;2 | PMID = 18081444 }}</ref>
*Yellow nodules ~ 1-5 mm.
**Some think they are white.<ref>CS. 7 February 2011.</ref>
 
DDx:
*[[Squamous metaplasia of the amnion]] - large irregular patches, usu. white.
 
Images:
*[http://www.webpathology.com/image.asp?n=2&Case=659 Amnion nodosum (webpathology.com)].
*[http://www.archivesofpathology.org/action/showFullPopup?id=i1543-2165-131-12-1829-f01&doi=10.1043%2F1543-2165%282007%29131%5B1829%3AANRCAP%5D2.0.CO%3B2 Amnion nodosum & squamous metaplasia of the amnion (archivesofpathology.org)].<ref name=pmid18081444/>
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===Microscopic===
Features:<ref name=pmid18081444/>
*Stratified squamous epithelium - non-keratinizing ''or'' minimal keratin.
*Amorphous acidophilic (pink) debris.
 
Note:
*Normal amnion = simple epithelium.
 
Images:
*[http://www.webpathology.com/image.asp?case=659&n=3 Amnion nodosum (webpathology.com)].
*[http://www.archivesofpathology.org/action/showFullPopup?id=i1543-2165-131-12-1829-f01&doi=10.1043%2F1543-2165%282007%29131%5B1829%3AANRCAP%5D2.0.CO%3B2 Amnion nodosum & squamous metaplasia of the amnion (archivesofpathology.org)].<ref name=pmid18081444/>
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==Placental meconium==
==Placental meconium==
Michael
48,849

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