DefinitionTransient familial hyperbilirubinemia is a metabolic disorder that is passed down through families. Babies with this disorder are born with severe jaundice.Alternative NamesLucey-Driscol syndromeCauses, incidence, and risk factorsTransient familial hyperbilirubinemia is an inherited disorder. It occurs when the body does not properly break down (metabolize) a certain form of bilirubin. Bilirubin levels rapidly build up in the body. The high levels are poisonous to the brain and can cause death.SymptomsThe newborn may have:Yellow skin (jaundice)Yellow eyes (icterus)LethargyIf untreated, seizures and neurologic problems (kernicterus) may develop.Signs and testsBlood tests for bilirubin levels can identify the severity of the jaundice.TreatmentPhototherapywith blue light is used to