I'm not in the medical profession, I'm just a humble internet user. It's entirely possible you know more than me - I'm happy to hear other ideas.

> Keto might buy some time before that takes effect but it is not a solution.

It might still be a solution. The cancer may be spread out and easier for the body to effectively tackle. Also note that it may depend on type or location.

One thing that does seem clear is that if you do go the keto route, you would need to stick at it. If you purposefully break it down, it spreads, then you give it back the fuel, it would probably make the situation far worse by growing rapidly in multiple locations.