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目的探讨MRI与超声在胎儿不同类型胼胝体发育不全(ACC)的产前诊断价值。方法对25例经超声及MRI同时检查后诊断为或疑诊为胎儿胼胝体发育不全的影像资料与随访结果进行对比分析,分别分析比较完全型胼胝体发育不全(CACC)、部分型胼胝体发育不全(PACC)及复杂型ACC合并的颅内异常MRI与超声诊断结果。结果 25例胎儿产前超声诊断CACC 14例,可疑诊断CACC 2例,诊断PACC 1例,可疑诊断PACC 6例,共漏误诊ACC 5例,发现诊断合并颅内其它异常6例。25例胎儿产前MRI诊断CACC 15例,诊断PACC 6例,可疑诊断PACC 2例,排除超声可疑诊断为PACC者2例,发现诊断合并颅内其它异常10例。结论超声与MRI两种方法产前诊断CACC的灵敏度无差异;在诊断PACC及ACC合并的颅内其它异常方面,MRI灵敏度优于超声。
Objective To investigate the value of prenatal diagnosis of different types of corpus callosum (ACC) in fetus by MRI and ultrasound. Methods The imaging data and follow-up results of 25 cases diagnosed or suspected as fetal hypoplastic corpus callosum after 25 cases of simultaneous diagnosis by ultrasound and MRI were compared and analyzed. The results of comparative analysis of complete corpus callosum hypoplasia (CACC), partial corpus callosum hypoplasia (PACC) ) And complex ACC combined with intracranial MRI and ultrasonic diagnosis of the results. Results Among 25 cases, there were 14 cases of prenatal ultrasound diagnosis of CACC, 2 cases of suspicious diagnosis of CACC, 1 case of diagnosis of PACC, 6 cases of suspicious diagnosis of PACC, 5 cases of misdiagnosis of common leakage and 6 cases of other intracranial diagnosis. 25 cases of fetal prenatal MRI diagnosis of CACC in 15 cases, diagnosis of PACC in 6 cases, suspicious diagnosis of PACC in 2 cases, excluding suspected ultrasound diagnosis of PACC in 2 cases, diagnosis and diagnosis of other intracranial abnormalities in 10 cases. Conclusion There is no difference in the sensitivity of prenatal diagnosis of CACC between ultrasound and MRI. MRI sensitivity is superior to ultrasound in diagnosing other intracranial abnormalities of PACC and ACC.