产前MRI诊断胎盘植入

Prenatal MRI diagnosis of placental invasion

目的探讨胎盘植入的MRI表现特点及产前诊断价值。方法回顾性分析胎盘植入患者14例,总结其MRI图像特点及诊断价值。结果 14例证实为胎盘植入的患者,产前MRI疑诊11例(11/14,78.57%)胎盘植入,表现为胎盘不均匀增厚,部分或完全覆盖子宫颈口;胎盘植入部子宫壁明显变薄,局部胎盘与子宫壁分界不清,可穿透子宫壁,侵袭邻近器官(如膀胱);可见T1WI高信号、T2WI低信号出血或血肿影;3例(3/14,21.43%)MRI未见确切胎盘植入征象。结论产前MRI对于诊断胎盘植入具有重要价值。

Objective To investigate the characteristics and diagnostic value of MRI for placental invasion.Methods Fourteen consecutive patients with placental invasion were analyzed retrospectively.MRI characteristics were reviewed and the diagnostic value was observed.Results All of 14 patients were confirmed with placental invasion at delivery.The presence of placental invasion was identified 11 patients（11/14,78.57%） with MRI,but missed in 3 patients（3/14,21.43%）.MRI showed irregular and heterogeneous placenta,thinner and discontinuous of uterine walls,and if bladder was involved,irregular appearance of the bladder wall.The uterine cervical orifices were completely or partly covered by placenta,sometimes there were bleeding or hematoma signs with hyperintensity on T1WI and hypointensity on T2WI.Conclusion MRI is valuable for prenatal diagnosis of placental invasion.