This is a question best answered by a medical doctor, preferably an oncologists. There are many, many dozens of different kinds of cancer some of which can be cured. Some cancers are highly curable which means trhat there is no evidence of remision within five years.
Some cancers appear to be incurable but a lucky few still survive.
The fact is that many different treatments exist for specific types of cancers. In fact, there will never be a so called miracle cure or magic bullet because some cancers are so fundamentally unique. Argonne National Laboratory, Division of Educational Programs, Harold Myron, Ph.D., Division Director.