Variable expression in ankyloblepharon–ectodermal defects–cleft lip and palate syndrome

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Abstract
The ankyloblepharon‐ectodermal defects‐cleft lip and palate (Hay‐Wells) syndrome is a rare autosomal dominant form of congenital ectodermal dysplasia. It is characterized by coarse, wiry, sparse hair; dystrophic nails; slight hypohidrosis; scalp infections; ankyloblepharon filiforme adnatum; hypodontia; maxillary hypoplasia; and cleft lip and palate. To date, 12 patients have been reported; however, the diagnosis has been questioned in 3 of these patients. We report 2 additional patients, one of whom has nasal speech but not cleft palate, in contrast to all other reported patients. This entity must be distinguished from numerous other forms of ectodermal dysplasia, especially those forms that can be associated with oral clefts and/or ankyloblepharon.