[Rotor's syndrome. Apropos of a case].

Rotor's syndrome is a rare hereditary non hemolytic hyperbilirubinemia. The authors report a new case of a 22-year-old man, with chronic asymptomatic fluctuating jaundice. Liver function tests such as alkaline phosphatase, gammaglutamyl transferase and aminotransferase were normal, the same applying to globulin levels. The diagnosis was confirmed by a typical bromsulphalein clearance test, oral cholecystography, and increased total urinary coproporphyrin as well as coproporphyrin isomer I.