Cancer can kill you in different ways. For example

Cancer can kill you in different ways. For example, a patient can die from pancreatic cancer with little primary tumor and metastasis from the tumor’s elaboration of a myocardial depressant factor, leading to cardiac death relatively quickly in the course of the illness. Brain tumors usually kill locally by direct extension of the primary. Colon kills from liver, lung and intra-abdominal Mets after the primary has been removed even years earlier in the course of the disease. Then there are all the iatrogenic causes from the various treatments. The Mets usually kill you with breast and melanoma. Leukemia will usually kill you from infection or bleeding with a “blast” crisis. But I would say that metastasis kills most with cancer. These are only a few examples, none of which are good. Stopping the progression of the Mets is huge. It should lead to a real prolongation of life.