Branchial arch anomalies in trisomy 18.

The authors report two newborns and one fetus with trisomy 18, who have severe anomalies of the first branchial arch: extreme microtia with imperforate external meatus in two cases, and hemifacial microsomia in a third one. Those cases point to the huge phenotypic variability of the trisomy 18.

Keywords

Chromosome Aberrations, Male, Infant, Newborn, Chromosome Disorders, Trisomy, Branchial Region, Phenotype, Humans, Abnormalities, Multiple, Female, Ear, External, Chromosomes, Human, Pair 18, Fetal Death, Head

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