[Antenatal diagnosis of a case of spondylo-costal dysplasia].

An ultrasound carried out on a foetus in utero made it possible to diagnose spondylocostal dysplasia. This does not seem to have been diagnosed previously in utero nor to have been reported. The authors view the mechanisms by which the mesoblastic portion of the cord changes and trace the development of this affection. The attitude of doctor towards the parents, in view of the ultrasound findings and the long term prognosis, is suggested.