Trisomy 13 with alobar holoprosencephaly Khalil Zouiten, MD Michèle Gueneret, MD Marie Hèlène Bellegarde Article Published: May 24, 2002 This is a trisomy 13 fetus seen at 11 weeks. Note the alobar holoprosencephaly with a single ventricle, the hypotelorism, the bilateral polydactyly of hands and feet. The mother is a 27 years old primipara with unremarkable anamnesis.     The X-rays Discussion Board Start a discussion about this article Add bookmark Bookmarked