Placental gross / microscopic abnormalities, nonneoplastic
Acute chorionic vasculitis

Author: Mandolin Ziadie, M.D. (see Authors page)

Revised: 12 October 2017, last major update September 2011

Copyright: (c) 2002-2017,, Inc.

PubMed Search: Acute chorionic vasculitis

Cite this page: Ziadie, M. Acute chorionic vasculitis. website. Accessed June 19th, 2018.
Definition / general
  • Vasculitis involving fetal vessels of chorionic plate or umbilical cord
Microscopic (histologic) description and grading
  • Neutrophilic infiltration into the wall of umbilical cord / chorionic plate vessels or Wharton 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 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)