الفهرس 
Embryology of the BrainOnly 14 pages are availabe for public view
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Abstract
Central nervous system (CNS) malformations are the second most frequent category of congenital anomalies, after congenital heart disease. It is important to diagnose these conditions as early as possible due to its neurological deficit and poor outcome. Although ultrasonography is commonly known as the screening modality of choice in the evaluation of fetus because of the cost-effectiveness and safety, the sonographic findings are occasionally inconclusive or insufficient for choosing the proper management especially in cases of maternal obesity, oligohydraminos and abnormal fetal lying. MRI is a useful adjuvant tool to ultrasound for evaluation of fetal brain >malformations because of its superior soft tissue contrast. Subtle or inconclusive ultrasound abnormalities can be confirmed or ruled out by MRI. In some cases, additional findings detected with MRI often help in arriving at a definitive diagnosis, which is necessary for parental counseling and for guiding management.