Abstract
Holoprosencephaly (HPE) is a complex brain malformation caused by incomplete fusion of cleavage of the cerebral hemispheres and deep brain structures affecting 6 to 12:10,000 live-born infants. There are three categories of HPE ranging in severity, with alobar holoprosencephaly being the most severe, followed by semilobar holoprosencephaly, and lobar holoprosencephaly being the mildest form. Facial anomalies as well as chromosome anomalies are often associated with HPE. This case study describes a transabdominal sonographic diagnosis of alobar HPE with cebocephaly originally found at 27 weeks 3 days on a patient with no prenatal care.
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