A 2-year-old boy with Rotor syndrome was studied with Tc-99m N-(di-iso
propylphenyl carbamoylmethyl) iminodiacetic acid (DIPA). In this patie
nt, the liver was not visualized, and there was persistent visualizati
on of the cardiac blood pool and along with prominent kidney excretion
. It is concluded that Tc-99m DIPA cholescintigraphy may be helpful in
the diagnosis of Rotor syndrome.