Cannabis oil helped cure my cancer, claims father who was given two years to live. Trevor Smith, 54, was diagnosed with bladder cancer in 2012. Told he needed immediate op to remove bladder and prostate, then chemo. But worried about his quality of life afterwards, he tried alternative therapies. Began taking cannabis oil after reading about it online. Claims that after 10 weeks, tests showed his cancer had not spread after all. This meant he was able to undergo much less invasive laser surgery. Has now been cancer-free for a year and wants to raise awareness of the oil.