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Placenta

Placental gross/microscopic abnormalities, non-neoplastic

Hemorrhage

Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 10 October 2011, last major update October 2011
Copyright: (c) 2003-2011, PathologyOutlines.com, Inc.

Definition
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● Bleeding between the placental floor and the uterine wall or between the placental parenchyma and membranes
● May be associated with vaginal bleeding, oligohydramnios and premature delivery

Etiology
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● Marginal hemorrhages are related to maternal age, parity and smoking
● Associated with marginal cord insertion, velamentous vessels and implantation in the lower uterine segment

Gross description
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● Chronic hemorrhage can result in marginal hematoma formation with circumvallate membranes

Micro description
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● Chorioamnionic hemosiderosis may be present

End of Placenta > Placental gross/microscopic abnormalities, non-neoplastic > Hemorrhage

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