Accuracy of prenatal sonography for detecting circumvallate placenta.

Antenatal screening for circumvallate placenta

“…In this study, I did not examine the other published diagnostic sonographic criteria for circumvallate placenta such as an irregular, uplifted edge of the placenta (where the placental margin was rounded) or a marginal shelf or rim (where the placental edge was thin or sheetlike). [4][5][6][7][8][9] However, the current method may be the simplest for detecting completely circumvallate placenta in comparison with some previous studies. [4][5][6][7][8][9] Some investigators have observed that placental thickness is not diagnostic of any particular condition but can contribute to the management of high-risk pregnancies such as placental abruption, oligohydramnios, and neonatal intensive care unit admission.…”

“…[4][5][6][7][8][9] However, the current method may be the simplest for detecting completely circumvallate placenta in comparison with some previous studies. [4][5][6][7][8][9] Some investigators have observed that placental thickness is not diagnostic of any particular condition but can contribute to the management of high-risk pregnancies such as placental abruption, oligohydramnios, and neonatal intensive care unit admission. [11][12][13] These conditions have been observed to be associated with the presence of circumvallate placenta.…”

“…14 In circumvallate placenta, the membranes become tethered, often in association with a marginal infarct, hemorrhage, or fi brin deposition. 5 The parenchymal villous chorionic tissue continues to grow beyond the tethered membranes and bulges out peripherally. 5 In addition, circumvallation has been reported to occur as a result of reduced amniotic pressure, circumferential hemorrhage, or both.…”

“…5 The parenchymal villous chorionic tissue continues to grow beyond the tethered membranes and bulges out peripherally. 5 In addition, circumvallation has been reported to occur as a result of reduced amniotic pressure, circumferential hemorrhage, or both. 1 These conditions may contribute to placental insuffi ciency and decreased fetal perfusion associated with the development of fetal growth restriction, asphyxia, and death, and they may also contribute to the presence of a sonographically thick placenta.…”

Fetus Disi Degerlendirme: Plasenta, Umbilikal Kord, Amniyon, Serviks

“…Ultrasonografinin sirkumvallat plasentayı saptamada doğruluğu düşüktür, yalancı pozitif ve yalancı negatiflikler olabilir. Uterin yapışıklıklar sirkumvallat plasentayı taklit eden görünümlere neden olabilir [8]. "Plasenta membranacea" ya da "diffüz plasenta", plasentanın tüm uterin kaviteyi ince bir membran şeklinde kaplamasıdır.…”