Two cases of massive subchorionic thrombosis

Abstract

Massive subchorionic thrombosis (MST) is defined as a massive thrombosis under the chorionic plate, and is responsible for obstetric complications. We encountered two cases of MST. Placental abruption was misdiagnosed by ultrasound examination in Case 1, and a cesarean section was performed at 33 weeks of gestation. Magnetic resonance imaging (MRI) at 21 weeks of gestation suggested MST in Case 2. A cesarean section was performed at 26 weeks’ gestation because of pregnancy-induced hypertension, fetal growth restriction and non-reassuring fetal status.