Prenatal MR diffusion-weighted imaging in a fetus with hemimegalencephaly
2006
We report a case of hemimegalencephaly diagnosed by prenatal MRI with an emphasis on its appearance on diffusion-weighted images. This case shows that in this condition the enlarged hemisphere may show restricted diffusion on prenatal MRI. In our opinion, this finding may result from a combination of increased cellularity and advanced myelination in the affected hemisphere. Restricted diffusion is an additional valuable indicator in the analysis of the fetal brain.
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