Hereditary spherocytosis coexisting with Gilbert's syndrome: a diagnostic dilemma.

Haemolytic anaemia generally gives rise to only a modest elevation of serum bilirubin. Unconjugated hyperbilirubinaemia of an extreme degree should raise suspicion of additional factors, such as Gilbert's syndrome, hepatocellular dysfunction or renal failure. We present a 17-year-old boy with hereditary spherocytosis coexisting with Gilbert's syndrome.