目的：胼胝体发育不全的CT和MRI诊断评价。方法：对16例儿童和成人胼胝体发育不全患者的CT和MRI表现进行分析，并讨论其诊断作用。结果：胼胝体发育不全的CT和MRI诊断要点是：①两侧脑室前角和室间孔分离；②侧脑室体部近乎平行地分离；③侧脑室枕角扩大；④第三脑室扩张并上前移位；⑤半球间裂异常地靠近第三脑室前部。结论：根据CT和MRI的特征表现，均可正确诊断胼胝体发育不全；但MRI矢状面扫描上，还可直观地显示胼胝体的发育异常。

OBJECTIVE: To evaluate CT and MRI images in the diagnosis of corpus callosum dysplasia. METHODS: The CT and MRI findings in 16 pediatric and adult cases with corpus callosum dysplasia were reviewed. RESULTS: CT and MRI diagnostic criteria of corpus callosum dysplasia were: ①separation of the frontal horns of the lateral ventricles and interventricular foramina; ②nearly parallel separation of the bodies of the lateral ventricles; ③enlarged occipital horns of the lateral ventricles; ④dilatation and anterior displacement of the third ventricle; ⑤abnormal proximity of interhemispheric fissure to the anterior part of the third ventricle. CONCLUSIONS: Correct diagnosis of corpus callosum dysplasia could be made on the basis of CT and MRI characteristics, but MRI might directly reveal the developmental abnormality of the corpus callosum on sagital scans.