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In most cases, the inflammation occurs in a term placenta. VUE is seen in 5-15% of the placentas The placenta is an organ that connects the developing fetus to the uterine wall. The absence of significant differences in placental phenotypes between group 1 and group 2 other than the histological pattern of villitis indicates that not the cytomegalovirus villitis but the direct viral cytopathogenic effect on fetal organs makes the difference in the dire clinical outcome in the former. Additionally, the inflammation may spread to the chorionic villi, which cover the placenta and facilitate the exchange of nutrients and gases between the mother and baby. This is a condition called villitis, which is usually benign but can increase the risk of fetal death.

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To assess the incidence, diagnosis, pathogenesis, and clinical and placental associations of congenital cytomegalovirus infection, 34 cases thereof diagnosed by placental/fetal or neonatal workup (group 1), and 494 placentas with villitis of unknown etiology (group 2) were extracted from a 6083-case placental database. 28 clinical and 47 placental phenotypes were compared between the two groups by Yates 2 … Placental involvement by CMV infection has been typically made by histological diagnosis of focal segmental lymphoplasmacytic villitis [28, 29], with additional histological features as described above and depicted in Fig. 1, and confirmed by positive immunohistochemistry or in situ hybridization on placental tissue [4, 5, 6, 17] (Figs. 1 and 2). 2020-06-01 2017-01-01 Placental villitis, which is defined by the presence of lymphocytic or macrophagic inflammatory cells within the villosities, constitutes a recently-described histopathological entity. This condition is the consequence of an immune response of the feto-placental unit towards a non-specific, multiple aggression and the incidence is very low. Chronic villitis is a relatively common pathologic finding usually in the third trimester placenta and has two distinct clinical associations: infectious and (apparently) non‐infectious.

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Not surprisingly, little is known about placental findings in such cases, with only 1 report of 3 cases in the world Villitis of unknown etiology (VUE) is a common lesion affecting placenta mostly during the third trimester on microscopic examination, whatever the pregnancy outcomes is. The cellular composition of the inflammatory infiltrate is defined by lymphocytes and macrophages, and VUE is thought to be the result of an immunological materno-fetal conflict.

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doi: 10.1067/s0002-9378(03)00577-5. 2021-02-24 Placentas with villitis were found to express MHC class II antigens. However, some showed no immunoreactivity. Occasional villi unaffected by villitis, including those near placental infarcts, also expressed MHC class II antigens. The study therefore showed that immunohistochemistry cannot be used to define villitis of unknown aetiology. Placental chronic villitis was observed in 44 cases (2.12%) of 2,073 histologically examined placentas. Infiltrating lymphocytes in chronic villitis were determined by immunohistochemistry to be predominantly helper/inducer T cells.

Introduction: Chronic villitis of unknown etiology (VUE) is a chronic inflammatory lesion of third trimester placenta, which contributes to major adverse obstetric outcomes. However, the inciting factors and mechanisms by which VUE contributes to adverse outcomes are poorly understood. Se hela listan på librepathology.org COVID-19, Villitis and Placenta in Pregnancy Turk Patoloji Derg. 2021 Jan 12. doi: 10.5146/tjpath.2020.01520. Online ahead of print.
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Even if the classic intranuclear and intracytoplasmic inclusions are not seen, an immunohistochemical study for CMV can be beneficial, as it will highlight infected cells and eosinophilic debris within the villi. Objective . To elucidate differences in the frequency and severity of acute chorioamnionitis (CAM) and chronic villitis in placentas from stillborns compared with liveborns at term and to evaluate other risk factors and placental findings. Design .

Even if the classic intranuclear and intracytoplasmic inclusions are not seen, an immunohistochemical study for CMV can be beneficial, as it will highlight infected cells and eosinophilic debris within the villi. Objective . To elucidate differences in the frequency and severity of acute chorioamnionitis (CAM) and chronic villitis in placentas from stillborns compared with liveborns at term and to evaluate other risk factors and placental findings. Design .
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VUE is an inflammatory condition involving the  Ninety-six full-term placentae were examined in the study. Of the 96 pregnancies. 72 were normotensive and 24 were complicated by hypertension. Of the 24  Comments: The most common routes of infection of placenta, membranes and umbilical cord are ascending infection (from maternal vaginal tract) or  18 Feb 2019 Villitis is a serious maternal health complication that occurs when a placental infection is left untreated. Villitis is characterized by the inflammation  Figure 13.1 A term placenta, bread-loafed to show extensive perivillous fibrin deposition, which was histologically found to be associated with VUE. Microscopic  We examined placentas where villitis was diagnosed in a previous pregnancy to establish the risk of recurrence and outcome. A total of 304 cases of VUA were  Chronic villitis is found in 5-15% of placentae and pregnancies complicated by fetal growth restriction and intrauterine death have an increased incidence, up to 34  villitis and maturation disorders.