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J Radiol. 2002 Mar;83(3):321-8.

[Prenatal diagnosis of isolated posterior fossa anomalies: attempt at a simplified approach].

[Article in French]

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  • 1Services de Gynécologie Obstétrique, Radiologie et Neuropédiatrie, Hôpital St Vincent de Paul, Paris, France.


The authors suggest, after some embryological, anatomical and nosological reviews, a simplified approach mainly based on the appearance of the pons, cerebellar hemispheres and vermis, independently from an associated cystic dilatation of the posterior fossa. Pontocerebellar hypoplasias and partial or total vermian agenesis are detailed because they can be diagnosed with a prenatal MRI. This classification based on our experience and on the literature data should be of value to evaluate the neurological prognosis.

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