Abstract: Objective To analyze the therapeutic effect of primary liver cancer treated by stereotactic radiotherapy. Methods 266 patients with primary liver cancer were treated with γ ray stereotatic radiotherapy（SRT）. The dose of 3200~4600cGy（300~500cGy/F,6F/w） were delivered to PTVs over 7 to 10 fracions,6 consecutive fractions per week. Results All patients were examined with image of CT or MRI. The total effective rate（CR+PR）,steady diseae（SD）,progressive disease（PD） was 79%,18% and 3%. The 1,2,3-year survival rates of patcents were 71.2%,40.3%,22.8%,respectively. No RILD and serious side effect occurred,and the gastrointestinal complications were uncomfortable in upper abdomen and poor appetite. Conclusions Stereotactic radiotherapy has good effect and little side effect in the treatment of primary liver cancer.

Key words: Hepatoma, Stereotactic, Radiotherapy