RT Book, Section A1 Corbett, Christopher DT. A1 Armstrong, Matthew J. A1 Claridge, Lee C. A2 Murray, Michael F. A2 Babyatsky, Mark W. A2 Giovanni, Monica A. A2 Alkuraya, Fowzan S. A2 Stewart, Douglas R. SR Print(0) ID 1102702277 T1 Gilbert Syndrome T2 Clinical Genomics: Practical Applications in Adult Patient Care YR 2014 FD 2014 PB McGraw-Hill Education PP New York, NY SN 9780071622448 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=1102702277 RD 2024/04/23 AB Disease syndrome:Gilbert syndrome (GS) is a hereditary defect in bilirubin metabolism.It has a prevalence of 3% to 7% in the United States of America, but worldwide this varies immensely with levels approaching 10% in parts of Western Europe.A 60% to 70% reduction in the liver’s ability to conjugate bilirubin leads to unconjugated (indirect) hyperbilirubinemia which may intermittently manifest as clinical jaundice.Jaundice due to GS does not indicate or result in liver damage.GS itself has no long-term harmful effects and does not reduce life expectancy.Hereditary basis:GS is an autosomal recessive inherited defect in the gene that codes for the enzyme uridine diphosphonate (UDP) glucuronyltransferase.Differential diagnosis:Other genetic defects of bilirubin metabolism (Table 74-1)Other causes of unconjugated hyperbilirubinemia such as hemolysis, drugs, and thyrotoxicosisGS and Pharmacogenetics:Any drug which is metabolised via glucuronidation may have altered activity in patients with GS.There is associated drug toxicity in GS with the chemotherapeutic agent, irinotecan. It is associated with an increased risk of neutropenia and diarrhoea.