Severe fetomaternal transfusion due to an unrecognized chorangioma in a dichorionic, diamniotic twin pregnancy

Fetomaternal hemorrhage is a serious but underrecognized complication and can be caused of placental chorioangiomas, among other things. Although rare, it poses significant risks of fetal anemia and perinatal morbidity. Increased awareness and routine Doppler monitoring of at-risk fetuses may facilitate earlier diagnosis and timely intervention, potentially improving outcomes. Particularly in children with anemia, fetomaternal transfusion should always be considered and HbF material determined.