Dermoodontodysplasia, also known as ectodermal dysplasia, hair-nail-tooth type, is related to tooth agenesis and ectodermal dysplasia. An important gene associated with Dermoodontodysplasia is ECTD8 (Ectodermal Dysplasia 8, Hair/Tooth/Nail Type). Affiliated tissues include skin, and related phenotypes are microdontia and sparse scalp hair