Effect of stereotactic radiotherapy for liver metastasis from gastric cancer and colorectal carcinoma

    LIANG Jun,ZHAO Pinª²Ting, SHAO Qiuª²Ju, QI Yuª²Hong

    Department of Radiotherapy, Tangdu Hospital, Fourth Military Medical University,Xi¬ðan 710038,China

    ¡¾Abstract¡¿ AIM: To evaluate the effect of stereotactic radiotherapy for liver metastasis from gastric cancer and colorectal carcinoma. METHODS: The 56 metastasis focus in 40 cases of liver metastasis from gastric cancer and colorectal carcinoma were treated with stereotactic radiotherapy. The 36 metastasis one in 22 cases were treated by ¦Ãª²knife. The 20 metastasis one in 18 cases were treated by Xª²knife. All cases were less than 5 metastatic focus respectively. The peripheral irradiation doses of the clinical planning target ranged from 3 Gy to 8 Gy each time, three times a week for 4-12 times totally. RESULTS: The 3ª²,6ª²,12ª²month tumor volume reducing rate of the 56 focus in 40 cases were 64ª±3%,82ª±1% and 82ª±1% respectively. The 3ª²,6ª²,12ª²month tumor disappearing rate of those were 32ª±1%,46ª±4% and 51ª±8% respectively; The second treatment were used for 2 cases because the tumor volume extended. The local control rate was no significantly different between Xª²knife treatment group and ¦Ãª²knife treatment group. The sideª²effect of stereotactic radiotherapy was lightly. CONCLUSION: The stereotactic radiotherapy can be used in practice for liver metastasis from gastric cancer and colorectal carcinoma. There have better effect and lesser sideª²effect with the methods. It can be used as a good selection of no wound treatment for liver metastasis from gastric cancer and colorectal carcinoma. ......