Aprimaryhumanrenalcellcarcinomawasdevelopedasaxenograft(NT-25)andmaintainedbyserialtransplantationinnudemice.TheeffectofUFTonthisneogrowthwastestedandevaluatedaswellitsdistributionintheanimaltissues.TheconcentrationofUFTwashigherintumortissuesthanthatinothertissuesandintheanimalexperimentationUFTwasfoundtobeeffectiveonhumanrenalcellcarcinoma.