As far as I know, Each cancer in a patient is mostly unique. Not all skin cancers or cancer tumor cases are same. they may have same underlying cause of it but not same cancer case. Mostly what treatment do is remove the affected tumor,tissues, if its related to blood plasma or bone-marrow transplant donor blood and bone marrow. Use chemo to weaken all cells of body regardless of its normal functioning or part of cancer. wait for human body to revive on its own immune system and repeat above task if needed.

so, to fight the cancer first we must find a way to affordably find the type of cancer with cause case-by-case basis and develop a procedure for custom treatment and drug-delivery to affected part without disturbing whole body functions. From my perspective we are still way behind but in better position then yesterday or decade ago.