Alagille syndrome is an inherited disorder that mimics other forms of prolonged liver disease seen in infants and
young children. However, a group of unusual features in other organ systems distinguishes Alagille syndrome
from other liver and bile duct diseases in infants. Specifically, Alagille syndrome is also associated with cardiac
disease, eye and skeletal findings and a characteristic facial appearance. The blood vessels and kidneys may also be
involved in a smaller proportion of cases.