[MRI of fetal central nervous system malformations].

Ultrasonography is the method of choice for prenatal malformation screening, but it does not always provide sufficient information for correct diagnosis or adequate abnormality evaluation. Fetal magnetic resonance imaging (MRI) is considered a valuable second line imaging tool for confirmation, completion and correction of complex fetal ultrasonography findings. Fetal MRI has proven its value in pathologies of the central nervous system. MR imaging's role includes nor only confirming or excluding possible lesions, but also defining their full extent, aiding in their characterization, and demonstrating other associated abnormalities. The article describes the most common anomalies of CNS discover by fetal MR.