Ambras syndrome: report on two affected siblings with no prior family history

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Abstract
We report two siblings with congenital generalized hypertrichosis and distinctive facial appearance consistent with the dysmorphic facial features described in Ambras syndrome. The patients were born to non-consanguineous, phenotypically normal parents. This is the first report of affected siblings and could be explained by either autosomal recessive inheritance or by germline mosaicism for an autosomal dominant gene. We compared the phenotype of our patients to descriptions of reported cases and discuss phenotypic variability.