The claim stories are out there as usual long before science can respond properly. Read them as they are quite compelling.
The oil is likely an unnecessary step but then who knows. What can be done easily is to drink raw cannabis juice and monitor your response. No harm is reported on this while the act of processing might allow for unwanted changes.
The take home is that this is a tool strongly indicated as powerfully helpful in cancer treatment..
7 Inspirational Stories of People Who Beat Their Cancer with Cannabis Oil