Tumors that you can find don't kill people with cancer, its the millions of metastases all over the body (or a specific organ) which actually cause cancer to be

Tumors that you can find don't kill people with cancer, its the millions of metastases all over the body (or a specific organ) which actually cause cancer to be deadly. There are a fair number of drugs which "treat tumors" (i.e. shrink tumors or stop their growth), but very few drugs actually extend the life of a cancer patient due to the metastatic issue mentioned above.