CASE 65
History: A patient who has had three prior cesarean sections now presents with vaginal bleeding in the second trimester and undergoes a follow-up ultrasound scan.
1. What should be included in the differential diagnosis for Figures A and B? (Choose all that apply.)
2. Which of the following is the least sensitive gray-scale criterion in diagnosing placenta accreta?
A. Loss of the retroplacental sonolucency zone
B. Irregularity of the retroplacental sonolucent zone
D. Thinning or disruption of the hyperechoic uterine serosa–bladder interface
3. Concerning color Doppler criteria of abruptio placentae, which of the following would be the least sensitive sign?
A. Markedly dilated vessels over the peripheral subplacental zone
B. Intraplacental hypervascularity in vascular spaces
C. Diffuse lacunar flow pattern
D. Hypervascularity of the uterine serosa–bladder interface
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