在北美,支气管肺癌是最常见的致命性癌症,死亡率占癌症总死亡数的25%以上。尸检报导脑转移者占18%一42%。脑转移常为多发,但也有将近27%的单发者。此类患者,如不经治疗,存活期约三个月。目前化疗帮助不大,放射治疗能延长生命,平均约 In North America, bronchial lung cancer is the most common fatal cancer, with mortality accounting for more than 25% of all cancer deaths. Autopsy reported that brain metastases accounted for 18% to 42%. Brain metastases are often multiple, but there are also nearly 27% of single individuals. Such patients, if left untreated, live for about three months. Currently chemotherapy is not helpful. Radiation therapy can prolong life.