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Difference between revisions of "Placenta"
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→Amnion nodosum: more
(→Amnion nodosum: +DDx) |
(→Amnion nodosum: more) |
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===Gross=== | ===Gross=== | ||
*Yellow | 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> | **Some think they are white.<ref>CS. 7 February 2011.</ref> | ||
DDx: | DDx: | ||
*[[Squamous metaplasia of the amnion]]. | *[[Squamous metaplasia of the amnion]] - large irregular patches, usu. white. | ||
Image: [http://www.webpathology.com/image.asp?n=2&Case=659 Amnion nodosum (webpathology.com)]. | Image: [http://www.webpathology.com/image.asp?n=2&Case=659 Amnion nodosum (webpathology.com)]. | ||
===Microscopic=== | ===Microscopic=== | ||
Features: | 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.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 & squmouas metaplasia of the amnion (archivesofpathology.org)].<ref name=pmid18081444/> | |||
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==Placental meconium== | ==Placental meconium== | ||