Percreta Score to Differentiate Between Placenta Accreta and Placenta Percreta With Ultrasound and MR Imaging

(Acta Obstet Gynecol Scand. 2022;101:1135–1145) In approximately 1.7 to 4.6 per 10,000 deliveries, the placenta remains attached to the uterine wall after birth, indicating that it is embedded in the myometrium; this is called placenta accrete spectrum (PAS) disorder. Cesarean delivery is associated with a significantly increased risk of PAS, and diagnosis of PAS is associated with severe delivery complications such as postpartum hemorrhage and peripartum hysterectomy. Placenta percreta is a severe form of PAS, where the placenta grows through the wall of the uterus and potentially into nearby organs, severely threatening the mother’s life: placenta percreta is associated with significant maternal morbidity. Being able to diagnose and correctly treat this condition is of paramount importance in reducing maternal morbidity due to these conditions. This study was designed to assess the ability of ultrasound and magnetic resonance imaging (MRI) features in classifying PAS (accreta/increta vs. percreta) predictively.