The state of the art in cancer treatment currently is personalized immunotherapies spearheaded by companies like BioNTech, etc.

Cancer should be viewed from a system wide perspective in my opinion rather than a location specific disease.

If you really want to get into biohacker territory, figure out how to sequence the tumor’s mutanome distribution and then generate a mRNA vaccine encoding the unique antigen markers of the tumor.

That’s basically what these biotech companies are doing[0]. If you need pointers on where to begin your research, BNT122 is a good place to start.

Good luck. Depending on how much money your friend has, you might be able to make something happen. Consider contacting biotech companies directly.

[0]: https://www.biontech.com/int/en/home/pipeline-and-products/p...