Familial unconjugated hyperbilirubinaemia: a condition due to an inherited congenital deficiency of the enzyme UDP glucuronyl transferase in the liver cells. Patients become mildly jaundiced, especially if they fast or have some minor infection. Occasionally they have mild abdominal discomfort. The jaundice can be diminished by small doses of phenobarbital, which stimulates enzyme activity. The condition is lifelong but harmless. N. A. Gilbert (1858–1927), French physician
Subjects: Medicine and Health — Chemistry.