cases of liver cancer （4 primary and 5 metatic） using 90Y-glass traped microspere injected into the unresected liver masses guided by realtime liver echography were reported. Two months later B ultrasound indicated there was a density change of the tumor mass with various magnitude

among them low density area almost disappeared in one case. The gistologic studies showed some tumor cells becaxne nectotic and leaves a hollow space. No patients complained discomfort or pain during and after treatment. It is not harmful to surrounding tissues. therefore this method may be an effective therapy modality to treat the inoperable liver cancer without obvious side effects.