11 June 2020 : Clinical Research
Application of Indirect Signs of Magnetic Resonance Imaging (MRI) in Prenatal Diagnosis of Abnormally Invasive Placenta
Fang Huang1ABCD*, Qing-quan Lai1EFG, Hong Wu1CDE, Xiao-ting Ke1BDEDOI: 10.12659/MSM.923272
Med Sci Monit 2020; 26:e923272
Abstract
BACKGROUND: The aim of this study was to assess the value of indirect MRI signs in the prenatal diagnosis of abnormally invasive placenta (AIP).
MATERIAL AND METHODS: This study involved the retrospective analysis of indirect signs of 109 patients with AIP and 59 patients without AIP. The numbers of cases of placenta increta, accreta, and percreta confirmed by surgical and pathological results were 54, 19, and 36, respectively. The indirect signs included the following: dark intraplacental bands in T2WI sequence, focal outward bulging of the placenta, abnormal placental vascularity, and heterogeneous placental signal intensity.
RESULTS: There were significant differences in dark intraplacental bands in T2WI sequence, focal outward bulging of the placenta, and abnormal placental vascularity between the AIP and the non-AIP groups. There was no significant difference in dark intraplacental bands in T2WI sequence between the placenta percreta and increta groups, but there was a significant difference between the other 2 AIP groups and the placenta accreta group. Focal outward bulging of the placenta was significantly different between the percreta group and the placenta accreta group, but there was no significant difference between the other 2 AIP groups and the placenta increta group. There were no significant differences in abnormal placental vascularity among the3 subtypes of AIP.
CONCLUSIONS: The indirect signs of dark intraplacental bands in T2WI sequence, focal outward bulging of the placenta, and abnormal placental vascularity are reliable signs of AIP. The indirect sign of dark intraplacental bands in T2WI sequence may be used to distinguish placental accreta from the other 2 subtypes of AIP.
Keywords: Magnetic Resonance Imaging, Placenta, Placenta Diseases, Case-Control Studies, Cesarean Section, Gestational Age, Placenta Accreta, Placenta Previa, Pregnancy, Prenatal Diagnosis, Sensitivity and Specificity
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