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Placenta

Placental gross/microscopic abnormalities, non-neoplastic

Acute chorionic vasculitis


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

Definition
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● Vasculitis involving fetal vessels of chorionic plate or umbilical cord

Micro description and grading
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● Neutrophilic infiltration into the wall of umbilical cord / chorionic plate vessels or Wharton’s jelly
● Severity is determined by the number of vessels involved and the presence of necrosis
Umbilical vasculitis: specify number of vessels with / without funisitis (extension into Wharton’s jelly)
Chorionic plate vasculitis: duration of inflammation may be estimated based on severity of associated maternal response: short (subchorionitis, chorionitis), intermediate (chorioamnionitis) or long (subnecrotizing, necrotizing chorioamnionitis)

End of Placenta > Placental gross/microscopic abnormalities, non-neoplastic > Acute chorionic vasculitis


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