Caused by mutation in the ectodysplasin A gene (ED1, 300451.0001) [MOLECULAR BASIS]
Heterozygous females show variable expressivity (mild to severe manifestations) including hypodontia, conical teeth, reduction in scalp/body hair, and difficulty nursing [MISCELLANEOUS]
Genetic heterogeneity (autosomal recessive form 224900 and autosomal dominant form 129490) [MISCELLANEOUS]