Pitt-Hopkins syndrome

Pitt-Hopkins Syndrome is a genetic disorder characterized by mental retardation, wide mouth and distinctive facial features, and intermittent hyperventilation followed by apnea. It is associated with an abnormality within chromosome 18: specifically, it is caused by an insufficient expression of the TCF4 gene.

Professor Phillip Beales, of the Institute of Child Health, has speculated that Peter the Wild Boy suffered from Pitt-Hopkins Syndrome.