HDlive imaging of vertical, bridging uterine synechia during pregnancy.

We present a case of vertical, bridging uterine synechia in the central part of the uterine cavity diagnosed by conventional two-dimensional (2D) sonography and HDlive at 29 weeks and 5 days of gestation. 2D sonography showed a uterine synechia located vertically in the central part of the uterine cavity, dividing the lower uterine cavity into two parts. HDlive clearly revealed triangular, vertical, and bridging uterine synechia with foot protrusion and umbilical cord prolapse in the lower uterine cavity. The low, liquor-filled amniotic cavity was divided by a thin membrane. MRI confirmed the vertical structure dividing the uterus with umbilical cord prolapse. Emergency cesarean section was performed at 37 weeks and 1 day of gestation because of onset of labor, and a female infant weighing 2,380 g was delivered with an umbilical artery pH of 7.25, and Apgar score of 6/9 at 1 and 5 min, respectively. The vertical, bridging synechia in the central part of uterine cavity was confirmed during the operation.