RT Journal Article SR Electronic T1 Genetic Heterogeneity of Cebocephaly JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 35 OP 40 DO 10.1136/jmg.11.1.35 VO 11 IS 1 A1 Holmes, Lewis B. A1 Driscoll, Shirley A1 Atkins, Leonard YR 1974 UL http://jmg.bmj.com/content/11/1/35.abstract AB Three infants with cebocephaly with entirely different aetiologies are described: one possibly representing the effect of a single mutant gene, one with apparent E trisomy, and one with D trisomy. In comparison with other reported patients, it is likely that infants with cebocephaly and no associated chromosomal abnormality have few, if any, extracranial malformations.