癌细胞扩散是癌症患者最不愿意听到的，那癌细胞是如何扩散的呢？
Doctors removed Mister Snow's cancerous colon in 2005. He had chemotherapy for 6 months. Most metastatic cancers are incurable. But most also are treatable. Chemotherapy drugs, radiation and other treatments can extend a patient's life. Life expectancies differ depending on the…