| Wolf-Hirschhorn syndrome is a developmental disorder with characteristics of typical craniofacial features, prenatal and postnatal growth impairment, intellectual disability, severe delayed psychomotor development, seizures, and hypotonia. Caused by a deletion in the short arm of the 4th chromosome (4p16.3 region), including at least part of the LETM1 and WHSC1 genes. Most cases are sporadic, but an unbalanced translocation may be inherited from a parent with a balanced rearrangement. |