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Acute Villitis

 
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Placenta_AcuteVillitis1.jpg

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The most common routes of infection of placenta, membranes and umbilical cord are ascending infection (from maternal vaginal tract) or hematogenous route. Hematogenous infections are usually viral or protozoal, whereas ascending infections are usually bacterial. The low-power image shows expansion of villi by an acute inflammatory infiltrate.

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