Placental Shape Aberrations

Prenatal diagnosis of placenta previa accreta by transabdominal color Doppler ultrasound

“…The placenta in abdominal pregnancy and rudimentary horn pregnancy should also cause concern. Abdominal pregnancy is considered by some to be a form of placenta accreta, because the placenta does not deliver spontaneously 8,16 . According to Benirschke 16 , the placental floor lacks decidua and a large vascular supply supports the intervillous circulation.…”

“…Abdominal pregnancy is considered by some to be a form of placenta accreta, because the placenta does not deliver spontaneously 8,16 . According to Benirschke 16 , the placental floor lacks decidua and a large vascular supply supports the intervillous circulation. Our color Doppler studies of one patient with term abdominal pregnancy showed placental tissue impinging upon the urinary bladder simulating placenta previa.…”

Structured evaluation and reporting in imaging of placenta and umbilical cord

“…The location should also be expressed with respect to the height of placenta into fundal, fundal and upper segment, upper segment, upper and lower segment, and placenta previa. Approximately 90% of the placenta is located at the upper segment with or without fundus (7). Placenta previa is the principal cause of third-trimester bleeding, often requiring an emergency Cesarean section.…”

“…Up to three-quarters of low-lying placenta at mid-term are converted to non-previa by term and two-thirds of fundal placenta move downward (7,9). Even in early or mid-gestation, low-lying placenta should be notified in the report due to later ramifications on therapy.…”

“…In addition, the risk of vasa previa and retained placenta after delivery increases in the presence of succenturiate lobe. Care should be taken to exclude the potential mimics such as uterine contractions and placenta wrapped around the lateral wall of uterus (3,7,16,17).…”