Placental gross / microscopic abnormalities, nonneoplastic
Chronic deciduitis

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

Revised: 12 October 2017, last major update September 2011

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

PubMed Search: Chronic deciduitis

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Cite this page: Ziadie, M. Chronic deciduitis. website. Accessed January 17th, 2019.
Definition / general
  • Abnormal infiltration of small lymphocytes and plasma cells in the decidualized endometrium
  • May be associated with preterm labor
  • Presence of plasma cells is a sign of stimulation, possibly by microorganisms, autoantigens or fetal alloantigens
Microscopic (histologic) description
  • Infiltrate of small lymphocytes and plasma cells in the decidua
  • Diffuse lymphocytic infiltrate without plasma cells is also acceptable (Hum Pathol 2000;31:292)