MRI added significant diagnostic information in about half the cases referred for workup of suspected CNS anomaly. In six of 17 cases where MRI worsened prognosis, TOP was chosen. Both additional CNS and non-CNS anomalies were diagnosed postnatally in 20%, emphasising the uncertain prognosis for, and evolution of, suspected CNS anomaly in fetuses.
Electronic poster abstracts the posterior fossa revealed the absence of cerebellar structures with ptosis of both occipital lobes occupying the anatomical space of the posterior fossa. The brainstem was normal in appearance with a normal volume. Ultrasound extracranial morphological examination, fetal mobility and amniotic fluid volume were normal. A viable male was delivered at 37 + 3 weeks' gestation with a birthweight of 3.2 kg. Prenatal sonographic diagnosis of complete cerebellar agenesis was confirmed by MRI. Clinical data was presented cerebellar syndrome characterized by delayed neuromotor development and deficient coordination of movement associated with mild mental retardation. Conclusions: Complete cerebellar agenesis can be diagnosed on prenatal ultrasound examination.
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