Variable expressivity and clinical heterogeneity can complicate the diagnosis and management of Pfeiffer syndrome.

Abstract excerpt

We report here a newborn female infant with striking features consistent with severe Pfeiffer syndrome (PS). Pfeiffer syndrome is a rare craniofacial disorder that has an autosomal dominant mode of inheritance (OMIM 101600). Our patient had unexpected differences between her clinical features and those predicted from her genetic tests. The following clinical features were noted: severe exophthalmos, syndactyly,...

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