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P099: Value of MR imaging in the prenatal diagnosis of clastic cerebellar lesions

Objective: To evaluate the contribution of prenatal MRI for the analysis of vascular cerebellar lesions. Methods: Retrospective study in the last ten years of 9 MRI cases. MRI results were compared with ultra-sound and pathology in five cases. Results and conclusion: MRI morphological abnormalities, which were favouring cerebellar vascular lesions were: unilateral hemispheric hypoplasia, unilateral hemispheric cleft, signal heterogeneity, irregular margins. Pathology confirmed vascular etiology whenever it was done. These morphological abnormalities of the cerebellum on the MRI should suggest a vascular mechanism. In those cases, underlying conditions must be looked for (placental anomalies, fetal distress, thrombophilia).