Holoprosencephaly Lenin Montilla, MD Article Published: Apr 3, 2006 Merida, Venezuela This is a 29-year-old woman, G2P1,Ā at 16 weeksĀ and 6 days of gestation. TheĀ scanĀ revealed a fetus with alobar holoprosencephaly. It shows the following features: Single ventricle Absence of midline structures Fused thalami The dissection: the skull... The brain (the "pancake" form) Opening of the single ventricle: Ā Discussion Board Start a discussion about this article Add bookmark Bookmarked