胎盘植入的磁共振新征象

The New MRI Findings of Placenta Accreta

目的通过MRI观察胎盘植入病例胎盘下血管改变,探讨胎盘植入的新征象,以提高MRI对胎盘植入的诊断价值。方法 41例经MRI检查,临床和病理诊断的胎盘植入患者,与41例随机选取的前置胎盘病例对照,比较两组胎盘下血管的差异。结果以胎盘下出现单纯增粗血管,不均匀增粗血管,增粗血管进入胎盘为异常。植入组胎盘下血管异常者占87.8%(36/41),对照组占9.8%(4/41),两组有极显著性差异(P<0.01)。增粗血管进入胎盘,穿透型占61.5%(8/13);植入型占38.9%(7/18);粘连型占10.0%(1/10)。三者比较有显著性差异(P<0.05)。结论胎盘下血管异常有可能是胎盘植入的新的征象,增粗血管进入胎盘可能有助于产前胎盘植入分型。

Objective To investigate the new MRI findings of placenta accreta by studying the subplacental vascularity,so as to improve the diagnostic value of MRI in placenta accrete.Methods 41 patients with pathologically and clinically confirmed placenta accrete underwent MRI（study group）,compared with 41 cases of placenta previa randomly selected（control group）.The differences of subplacental vascularity between two groups were compared.Results The abnormal subplacental vascularity were described as regular dilated subplacental vascularity,irregular dilated subplacental vascularity and dilated subplacental vascularity extend into placenta.The abnormal subplacental vascularity was detected in 36 of 41 cases（87.8%） in the study group,and 4 of 41 cases（9.8%） in the control group,the differences were significant（P 0.01）.The finding of dilated subplacental vascularity extend into placenta was detected in 61.5%（8/13） in placenta percreta,38.9%（7/18） in placenta increta and 10.0%（1/10） in placenta accreta,and the differences were significant（P 0.05）.Conclusion The abnormal subplacental vascularity may be a new finding for placenta accreta.Dilated subplacental vascularity extended into placenta may be useful for the type of placenta accreta.