The following features differentiate Rotor syndrome from Dubin Johnson's syndrome except:
Rotor syndrome Dubin Johnson's syndrome Appearance of liver Normal appearance Liver has black pigmentation Gall bladder visualization on oral cholecystography Gallbladder is usually visualized Gall bladder can't be visualized Total urine coproporphyrin content High with <70% coproporphyrin I Normal with >80% coproporphyrin I