Placenta accreta spectrum disorders; MRI, ultrasound and histological correlation
G Madigan1,T Geoghegan2, E Doyle3 JC Donnelly1,2,3 1 Royal College of Surgeons in Ireland, 2 Mater Misericordiae University Hospital 3 Rotunda Hospital
Placenta accreta spectrum (PAS) disorders include both abnormally adherent and invasive placentas. There are three categories1
PAS disorders are also divided into focal, partial, or total categories depending on the number of placental cotyledons involved.
PAS disorders result in the failure of the placenta to detach from the uterine wall following delivery, which can lead to massive obstetric haemorrhage. Prenatal diagnosis is essential for optimal peripartum management. Prenatal diagnosis relies on a combination of ultrasound and MRI findings. The definitive diagnosis can only be made by histopathological examination of the placenta and uterus following delivery.