Rotor Syndrome

Rotor Syndrome is a rare inherited liver condition that affects how the body processes and removes a substance called bilirubin, which is produced when red blood cells break down. This condition involves the liver's ability to transport bilirubin properly, leading to a buildup of conjugated bilirubin in the blood. People with this syndrome often have mild jaundice, which is a yellowing of the skin and eyes. The liver and bile system are the main body systems involved. Although it causes persistent jaundice, Rotor Syndrome usually does not lead to serious liver damage or other health problems. It is important to understand that this condition is different from other causes of jaundice because it is benign and does not require aggressive treatment.

Rotor Syndrome is a benign hereditary disorder characterized by chronic, predominantly conjugated hyperbilirubinemia due to a defect in hepatic bilirubin storage and excretion. It results from mutations affecting the organic anion transporting polypeptides (OATP1B1 and OATP1B3), which impair the hepatic uptake of conjugated bilirubin from the blood. Unlike other hyperbilirubinemias, Rotor Syndrome does not involve hemolysis or liver cell injury and is distinguished by the absence of liver enzyme elevation. The condition is inherited in an autosomal recessive pattern and is clinically significant mainly for its presentation with mild jaundice without progression to liver failure. It is important to differentiate it from Dubin-Johnson Syndrome, which also causes conjugated hyperbilirubinemia but features a darkly pigmented liver on biopsy.