To explore ultrasonographic characteristics and prognosis of cesarean scar pregnancy in the ultrasound.

To conducted a retrospective study of 8 cases of diagnoses of cesarean scar pregnancy in ultrasound in our hospital from January 2013 to August 2015. All cases had ultrasonographic examinations regularly during the pregnancy and were confirmed placenta increta by cesarean section or prenatal MRI (6 cases). The imaging characteristics of 8 cases of pregnant women in early pregnancy by transvaginal ultrasound, and the positions of gestational sac and chorion frondosum were observed. Ultrasonic follow-up results, numbers of cesarean delivery, final diagnosis, and pregnancy outcome were analyzed.

Eight cases of patients were diagnosed cesarean scar pregnancy, and all of ceses were diagnosed placenta increta by ultrasound from 11 weeks to 24 weeks of gestation. It was found that the positions of chorion frondosum were located in the lower edge of gestational sac in Two-dimensional ultrasound and the chorion frondosum was covered in cesarean section scar. The echoes of proliferous chorion frondosum were stronger than the rest of chorion leve and decidua reflexa, and the thickness of proliferous chorion frondosum were thicker than the rest of chorion leve and decidua reflexa. In the follow-up ultrasound of 8 cases in the second trimester, the original position of chorion frondosum which covered and the position of placenta were roughly similar. The position of placenta did not move up with the gestational weeks, in addition, appeared as placenta previa and covered in cesarean section scar. Five patients had strong childbearing willing of continue to conceive, one case of which needed hysterectomy, four of which underwent cesarean section delivery with alive births after using bilateral iliac arteries balloon occlusion. The rest 3 cases underwent induction of labor after using bilateral iliac arteries balloon cclusion.

Cesarean scar pregnancy in first pregnancy may be develop as placenta accreta in second and third trimester pregnancy. If chorion frondosum was observed to cover cesarean section scar by ultrasound in early pregnancy, scar pregnancy diagnosis was established. Pregnant women who have strong willing to continue their pregnancy should be pay more attentin to thiers placenta previa and placenta percreta in second and third trimester pregnancy. Close follow-up are needed.