Pathology

The following features differentiate Rotor syndrome from Dubin Johnson's syndrome EXCEPT

Liver in patients with Rotor syndrome has no increased pigmentation and appears normal

In Rotor syndrome, Gall bladder is usually visualized on cholecystography

Total urinary coproporphyin is substantially increased in Rotor syndrome

Fraction of coproporphyin I in urine is elevated usually more than 80% of the total in Rotor syndrome