BBC news
Now, the thing I don't get is -how can they know that any of these detected 'cancers' that they go on to treat aren't 'life-threatening'? That had they left well alone, it would all have been fine? They don't have an exact 'control group' to measure against, do they?
I am genuinely intrigued as to how it can be decided that 'treatment was unnecessary' when a cancer is detected.