<unk>  (also known as AEC syndrome; see Naming) is one of at least 150 known types of ectodermal dysplasia. These disorders affect tissues that arise from the ectodermal germ layer, such as skin, hair, and nails.
Hay–Wells syndrome
Kindler syndrome
Hurler syndrome
Birk-Barel syndrome
Baboon syndrome
Muckle–Wells syndrome
Hecht Scott syndrome
GRACILE syndrome