Ellis-Van Creveld syndrome is a rare genetic disorder characterized by short limb dwarfism, additional fingers and/or toes (polydactyly), abnormal development of fingernails and, in over half of the cases, congenital heart defects. Motor developme...

Pallister-Hall syndrome (PHS) is an extremely rare genetic disorder that is typically apparent at birth. The symptoms and findings associated with the disorder may vary greatly in range and severity from patient to patient. However, in many indivi...