NCIt synonyms : Witkop Syndrome; HND; Hypodontia and Nail Dysplasia; Hypodontia-Nail Dysplasia; Hypodontia with Nail Dysplasia;
NCIt definition : A rare genetic disorder with an autosomal dominant pattern of inheritance. It is associated
with mutations in the MSX-1 gene on chromosome 4 which alter ectodermal morphogenesis.
Characteristic clinical signs include absent or poorly-formed dentition and brittle,
spoon-shaped finger and toenails. Clinical course features an increased incidence
of dental caries but is essentially benign.;