Atypical acrofacial dysostosis syndrome.

We describe a male fetus with a combination of defects, including severe mandibulofacial dysostosis, holoprosencephaly, upper limb deficiency, and microgastria. These abnormalities indicate a severe defect of gastrulation/blastogenesis predominantly affecting cephalad structures. This combination of anomalies has to our knowledge not previously been described. We propose that the anomaly pattern represents either a blastogenesis-related association, or a microgastria-limb deficiency polytopic field defect.