RT Journal Article SR Electronic T1 Holoprosencephaly-polydactyly ('pseudotrisomy 13') syndrome: a syndrome with features of hydrolethalus and Smith-Lemli-Opitz syndromes. A collaborative multicentre study. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 297 OP 303 DO 10.1136/jmg.28.5.297 VO 28 IS 5 A1 Verloes, A A1 Aymé, S A1 Gambarelli, D A1 Gonzales, M A1 Le Merrer, M A1 Mulliez, N A1 Philip, N A1 Roume, J YR 1991 UL http://jmg.bmj.com/content/28/5/297.abstract AB A syndrome of holoprosencephaly and postaxial polydactyly, associated with hydrocephalus, heart defect, adrenal hypoplasia, and other visceral malformations, has been observed in five unrelated children with normal chromosomes. Clinical overlap with lethal acrodysgenital dwarfism (Smith-Lemli-Opitz syndrome type II) and hydrolethalus syndrome is discussed. Recessive inheritance seems likely.