[Effects of stereotactic radiotherapy targeting for recurrent gastric cancer]

We report the effects of stereotactic radiotherapy (SRT) targeting for distant solitary metastases from gastric cancer that were uncontrollable with chemotherapy. SRT(52.8 Gy per 4 fractions) was performed in 3 patients with liver metastasis and 1 patient with lung metastasis. Although SRT showed no effect in the patient with lung metastasis, complete remission from liver metastasis with cystic change was observed in all 3 patients. One patient died due to multiple liver metastasis, and the other 2 patients are alive 27 and 41 months after SRT without liver metastasis. Although pneumothorax and pleural effusion were recognized in 1 case, grade 3 or 4 adverse events were not recognized in all 4 cases. SRT showed excellent local therapeutic effects without serious complications, suggesting that this is an effective treatment for localized metastasis from gastric cancer.