Abstract
Objectives: Cases of ventricumegaly were evaluate fetal MRI to establish the contribution of the MRI regarding aetiological diagnosis, additional findings and management. Methods: We evaluate 91 cases of ventriculomegaly (VM) between 20–28 gestational weeks (range 23.4 weeks). All cases of VM were screened by ultrasound (US) using the atrial width classified as normal when atrial width 15.0 mm. All MRI studies were performed up to 7 days after the US diagnosis. All cases were followed by US every 4 weeks and a 2nd MRI was performed between 32–36 weeks. Results: There was 68 cases of mild VM (74.2%) and 25.1% cases of severe VM. Fetal MRI brings additional information regarding the size of the 4th ventricule, evaluating the walls and surface of the ventricules, the position of the fornix, analyses of the germinal zone, posterior fossa (cerebellar herniation), gyration process and evaluation of ventricular symetry or asymetry. The 2nd MRI allow us to understand the progression of different aetilogical processes of VM. Conclusions: Fetal MRI should be used in cases of VM as a complementary method to evaluate intracranial additional findings that could contribute to a more refined aetilogical diagnosis of ventriculomegaly.
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