Focal Facial Dermal Dysplasia 3, Setleis Type, also known as focal facial dermal dysplasia type iii, is related to ablepharon-macrostomia syndrome and focal facial dermal dysplasia 1, brauer type. An important gene associated with Focal Facial Dermal Dysplasia 3, Setleis Type is TWIST2 (Twist Family BHLH Transcription Factor 2). Affiliated tissues include skin, and related phenotypes are prematurely aged appearance and aplasia/hypoplasia of the skin