ICD-11 definition : Ectodermal dysplasias (EDs) are a heterogeneous group of disorders characterized by
developmental dystrophies of ectodermal structures, such as hypohidrosis, hypotrichosis,
onychodysplasia and hypodontia or anodontia. More than 160 clinically and genetically
distinct hereditary ectodermal dysplasias have been catalogued.;
Ectodermal dysplasias (EDs) are a heterogeneous group of disorders characterized by
developmental dystrophies of ectodermal structures, such as hypohidrosis, hypotrichosis,
onychodysplasia and hypodontia or anodontia. More than 160 clinically and genetically
distinct hereditary ectodermal dysplasias have been catalogued.