PRENATAL DIAGNOSIS OF A LARGE PLACENTAL CYST WITH INTRACYSTIC HEMORRHAGE. A. ANDOLSI, N. BOUCHNAK, L. BEN HASSINE, S. BEN DHIA, L. LAHMAR, H. LOUATI, W. DOUIRA, I. BELLAGHA PEDIATRIC Radiology department, Béchir Hamza Children’s Hospital, Tunis, Tunisia. OB8. OBJECTIVES.
PRENATAL DIAGNOSIS OF A LARGE PLACENTAL CYST WITH INTRACYSTIC HEMORRHAGE
A. ANDOLSI, N. BOUCHNAK, L. BEN HASSINE, S. BEN DHIA, L. LAHMAR, H. LOUATI, W. DOUIRA, I. BELLAGHAPEDIATRIC Radiology department, BéchirHamza Children’s Hospital, Tunis, Tunisia
presented at our institution at 23 weeks of gestation for a routinely obstetrical ultra-sound examination.
Figure 1 : Ultra-soundexaminationat 23 weeks of gestation demonstrating a heterogeneous and hyperechoic cyst in the fetal surface of the placenta (asterisk).
Figure 2 : Hemorrhagicplacentalcyst (asterisk) near the placentalcord (arrow).
Placenta avillousspaces or “placental lakes” :
They are located mainly within the placental tissue and are characterized by a turbulent blood flow on real-time ultrasonography.
They result from bleeding that is maternal in origin. On ultrasonography, they appear as a hypoechoic area between the chorion and the uterine wall.
Most subchorionic cysts are thought to be obstetrically harmless.
However, a large subchorionic cyst near the placental cord insertion site should be considered a pathological lesion and followed closely by US examination, to rule out a secondary intracystic hemorrhage, a partial occlusion of umbilical cord blood flow, a fetal growth restriction secondary to the cyst or an intraamniotic rupture leading to fetal death.