Differential Effects of DLX3 Mutations Drive Phenotypic Variability in Tricho‐Dento‐Osseous Syndrome via Direct Activation of WNT10A

DLX3 is a homeobox transcription factor essential for multiple organogenesis processes. Mutations in DLX3 cause trichodentoosseous syndrome (TDO), characterized by curly hair, sclerotic bone, enamel, and dentin defects as well as taurodontism. Phenotypic variability in TDO has been well documented, but its pathogenesis remains poorly understood. Here, we characterized three TDO families with distinct clinical features and identified a known DLX3 deletion (c.561_562del) and the first pathogenic s