Ultrasonography and MRI in the Diagnosis of Cesarean Scar Pregnancy / 中国医学影像学杂志

ABSTRACT

Purpose The incidence of cesarean scar pregnancy (CSP) shows a rising trend in recent years, and misdiagnosis or improper treatment of it can cause serious consequences. In this paper, we analyzed the characteristics of MRI and ultrasonography of CSP to provide a basis for choice of clinical imaging techniques. Materials and Methods Fifty-eight patients with cesarean scar pregnancy were studied retrospectively, all the cases underwent preoperative color Doppler ultrasound (trans-vaginal or together with trans-abdominal), and 31 cases were examined with MRI, the accurate imaging features and diagnosis rate of each was analyzed.Results 48 patients (82.8%) were diagnosed accurately by color Doppler ultrasound, including 20 cases of out-growth type (95.2%, 20/21), 18 cases of inner-growth type (90.0%, 18/20) and 10 cases of mass type (58.8%, 10/17); 27 cases (87.1%) were diagnosed accurately by MRI, including 8 cases of out-growth type (100.0%, 8/8), 4 cases of inner-growth type (66.7%, 4/6), and 15 cases of mass type (88.5%, 15/17).Conclusion The diagnostic accuracy of sonography for CSP is close to that of MRI, thus can act as the first choice; MRI can be chosen for combine examination to improve the accurate diagnostic rate when the CSP case is mass type detected by ultrasonic findings which is difficult to be diagnosed.