Description : Holoprosencephaly (HPE) is the most commonly occurring congenital structural forebrain
anomaly in humans. HPE is associated with mental retardation and craniofacial malformations.
Considerable heterogeneity in the genetic causes of HPE has been demonstrated (Ming
et al., 2002).;
Inheritance : Autosomal dominant;
Molecular basis : Caused by mutation in the patched 1 gene (PTCH1, 601309.0011);