Electromagnetic waves cause brain cancer ?

[Fireball]

Certain EM waves do cause cancer. Considering that gamma rays are a form of electromagnetic radiation, as is visible light, and a bunch of other things might i add. (And gamma rays do cause cancer. They're also good for removing it too. Strange how that works.)

(Yeah, i know the conversation's more about mobile phone related EM waves, but because of lack of specifics, it's still valid).

We use X-Rays to treat cancer, not gamma rays, though gamma rays are certainly energetic enough to cause cancer. I'm not sure we have a way of shielding a gamma-ray source for irradiating a patient accurately.