title: Vascular basis for malformations in a twin.
abstract: A twin is described who was born with ileal atresia and hydranencephaly, the co-twin having died at about 24 weeks' gestation. If a macerated or autolysed twin is found at birth, the paediatrician should be alerted to the possibility of serious and not immediately obvious defects in the surviving infant.
mesh_terms: D000757:Anencephaly / Q000209:etiology*; D004200:Diseases in Twins; D005260:Female; D005313:Fetal Death / Q000150:complications*; D006801:Humans; D006832:Hydranencephaly / Q000209:etiology*; D007082:Ileum / Q000002:abnormalities*; D007231:Infant, Newborn; D007409:Intestinal Atresia / Q000209:etiology*; D008297:Male; D011247:Pregnancy; D013927:Thrombosis / Q000150:complications*; D014430:Twins, Monozygotic