A 36 year old woman came at 27 weeks of gestation for a routine growth scan. There was history of three previous cesarean sections. After the ultrasound examination, an MRI performed in view of placental adherence.
MRI of the pelvis shows the placenta to be anterior, low lying and covering the internal os. It shows heterogeneous signal intensity with a few abnormal lacunae. The myometrium is thinned out with loss of normal placento-myometrial junction in the lower uterine segment at the scar site. The retro-placental T2 dark line is not seen. There are a few abnormal T2 hypointense bands in the placenta at this site. There are multiple abnormal vessels showing T2 flow void at the interface of the lower uterine segment and the superior surface of the urinary bladder. There is doubtful loss of fat planes with the superior wall of urinary bladder suggestive of placenta percreta.