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
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● Vasculitis involving fetal vessels of chorionic plate or umbilical cord
Micro description and grading
● 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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