The hereditary
hyperbilirubinemias include (1) those resulting in predominantly
unconjugated hyperbilirubinemia, such as Gilbert or Arias syndrome,
Crigler-Najjar syndrome type I, and Crigler-Najjar syndrome type II; and (2)
those resulting in predominantly conjugated hyperbilirubinemia, such as
Dubin-Johnson syndrome, Rotor syndrome, and other forms of intrahepatic
cholestasis.